Presenter study handout

2.1 — Module 2

Transition

Module 2

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Say this

Transition: "Module 2."

My notes

2.2 — The Visual Pathways

Title

Module 2

The Visual Pathways

Ventral "what" vs. dorsal "where," and their classroom signatures.

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Ventral "what" vs. dorsal "where," and their classroom signatures.

Say this

Open here. "The Visual Pathways." Ventral "what" vs. dorsal "where," and their classroom signatures.

Say why this section matters for their caseload, then advance.

My notes

2.3 — Where do your students struggle?

Poll

Where do your students struggle?

Which visual performance patterns show up most in your current caseload?

Select all that apply.

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Which visual performance patterns show up most in your current caseload?
– Slow recognition of letters, words, or symbols
– Losing place, bumping into things, misjudging space
– Both identification and spatial problems
– I am not sure how to tell the difference

Say this

Ask the poll: "Which visual performance patterns show up most in your current caseload?"

Options:

• Slow recognition of letters, words, or symbols

My notes

2.4 — Two streams, one retina

Visual

Neuroanatomy

Two streams, one retina

Retina → optic nerve → chiasm → LGN → primary visual cortex (V1), then divergence: the dorsal stream travels superiorly to parietal cortex, the ventral stream inferiorly to temporal cortex.

Retina → optic nerve → chiasm → LGN → V1, then divergence: dorsal superiorly to parietal cortex, ventral inferiorly to temporal cortex (Visual Minds Learning clinical education).

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Retina → optic nerve → chiasm → LGN → V1, then divergence: dorsal superiorly to parietal cortex, ventral inferiorly to temporal cortex (Visual Minds Learning clinical education).
Diagram: pathway-routing

Say this

Talk over the visual: "Two streams, one retina."

Say the caption in your own words: Retina → optic nerve → chiasm → LGN → V1, then divergence: dorsal superiorly to parietal cortex, ventral inferiorly to temporal cortex (Visual Minds Learning clinical education).

My notes

2.5 — Parvocellular and magnocellular tracts

Visual

Tracts

Parvocellular and magnocellular tracts

	Parvocellular	Magnocellular
Cell body size	Small (parvo = “small”)	Large (magno = “large”)
LGN layers	Layers 3–6	Layers 1–2
Best at	Fine spatial detail, color (red/green)	Motion, low contrast, coarse form
Temporal response	Sustained, slower conduction	Transient, fast conduction
Contrast sensitivity	Needs higher contrast	Responds to very low contrast
Feeds primarily	Ventral “what” stream	Dorsal “where/how” stream
Functional signature	Slow letter/word ID, detail errors, color-cue reliance	Place loss, spatial/postural errors, motion-guided reach errors

Parvocellular and magnocellular tracts carry different information from retina to cortex — they explain transmission, not treatment. OT addresses the functional components in the bottom row; we never treat or train a tract.

Parvocellular cells carry fine detail and color into the ventral stream; magnocellular cells carry motion and low-contrast information into the dorsal stream.

Tract attribution explains transmission — how the signal gets to cortex. OT never treats a tract; we address the functional components it supports and document in occupational language.

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Parvocellular cells carry fine detail and color into the ventral stream; magnocellular cells carry motion and low-contrast information into the dorsal stream.
Diagram: parvo-magno-tracts

Say this

Talk over the visual: "Parvocellular and magnocellular tracts."

Say the caption in your own words: Parvocellular cells carry fine detail and color into the ventral stream; magnocellular cells carry motion and low-contrast information into the dorsal stream.

My notes

2.6 — Vision's Two Highways

Visual

Neuroanatomy

Vision's Two Highways

The retina sends two parallel “highways” to the LGN: the magnocellular tract handles motion, contrast, and spatial-action cues; the parvocellular tract handles detail, color, and object recognition. Both pass through the LGN, then split into the dorsal (where/how) and ventral (what) streams.

The magnocellular highway (motion, contrast, spatial awareness, action) and the parvocellular highway (detail, color, form, recognition) merge at the LGN before diverging into the dorsal and ventral streams.

Use this metaphor to remember which tract carries which information. Remember the scope line: we work on the functional components riding on the highway, not on the highway itself.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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The magnocellular highway (motion, contrast, spatial awareness, action) and the parvocellular highway (detail, color, form, recognition) merge at the LGN before diverging into the dorsal and ventral streams.
Diagram: two-highways

Say this

Talk over the visual: "Vision's Two Highways."

Say the caption in your own words: The magnocellular highway (motion, contrast, spatial awareness, action) and the parvocellular highway (detail, color, form, recognition) merge at the LGN before diverging into the dorsal and ventral streams.

My notes

2.7 — Vision's two highways in the school day

Visual

Classroom translation

Vision's two highways in the school day

Ventral "what" signs versus dorsal "where" signs, side by side with the classroom behaviors each one produces.

Treat the function, not the anatomy — the stream explains the behavior; the intervention targets the task.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Ventral "what" signs versus dorsal "where" signs, side by side with the classroom behaviors each one produces.

Say this

Talk over the visual: "Vision's two highways in the school day."

Say the caption in your own words: Ventral "what" signs versus dorsal "where" signs, side by side with the classroom behaviors each one produces.

My notes

2.8 — Ventral vs. dorsal at a glance

Comparison

The two streams

Ventral vs. dorsal at a glance

Ventral stream — "What?"

Parvocellular tract
Object identity, color, size, fine detail
Supports letter/word recognition and object identification
Deficits show up as slow or inaccurate visual identification

Dorsal stream — "Where?"

Magnocellular tract
Spatial orientation, mapping, posture, balance
Supports locating items in space and guiding movement toward them
Deficits show up as spatial, postural, and navigation errors

Source: Visual Minds Learning, "Visual Pathways".

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Ventral stream — "What?": Parvocellular tract · Object identity, color, size, fine detail · Supports letter/word recognition and object identification · Deficits show up as slow or inaccurate visual identification
Dorsal stream — "Where?": Magnocellular tract · Spatial orientation, mapping, posture, balance · Supports locating items in space and guiding movement toward them · Deficits show up as spatial, postural, and navigation errors

Say this

Contrast the two columns: Ventral stream — "What?" versus Dorsal stream — "Where?".

Ventral stream — "What?":

• Parvocellular tract

My notes

2.9 — What a ventral-stream (parvocellular) signature looks like in class

Teaching slide

Classroom signatures

What a ventral-stream (parvocellular) signature looks like in class

Slow, effortful recognition of letters, sight words, or numerals
Confusing visually similar letters or symbols beyond the expected age
Difficulty matching an object to its picture or naming what was just seen
Strong performance on movement-based tasks but weak on detail/identification tasks

Dorsal — "where / how"

Occipital → parietal

• Bumps furniture, misjudges stairs and doorways
• Loses place, uneven spacing, drifting margins
• Struggles in visually busy rooms
• Reach and grasp inaccurate under time pressure

Ventral — "what"

Occipital → temporal

• Letter and symbol confusion beyond age expectation
• Difficulty recognizing familiar faces or objects
• Relies on color or context cues to identify items
• Slow to find a known item in an array

Two cortical streams, two classroom signatures. "What" failures look like recognition errors; "where" failures look like navigation, spacing, and copying errors.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Slow, effortful recognition of letters, sight words, or numerals
Confusing visually similar letters or symbols beyond the expected age
Difficulty matching an object to its picture or naming what was just seen
Strong performance on movement-based tasks but weak on detail/identification tasks

Say this

Frame the slide: "What a ventral-stream (parvocellular) signature looks like in class."

Walk each point, one sentence each:

• Slow, effortful recognition of letters, sight words, or numerals

My notes

2.10 — What a dorsal-stream (magnocellular) signature looks like in class

Teaching slide

Classroom signatures

What a dorsal-stream (magnocellular) signature looks like in class

Bumping into furniture, misjudging distances, poor spatial awareness in the room
Difficulty locating an item visually even when it is in plain sight
Trouble copying spatial layouts — maps, graphs, math columns, diagrams
Balance, posture, or motor-planning concerns alongside the visual complaint

What you observe	More consistent with	Next OT move
Slow, effortful letter or sight-word recognition	Ventral	Describe identification accuracy and rate; reduce visual detail load
Confuses visually similar letters past expected age	Ventral	Sample discrimination directly; refer if acuity untested this year
Loses place returning from board to page	Dorsal	Line marker, copy-reduction; screen saccades and fixation stability
Bumps furniture, misjudges distance in transitions	Dorsal	Environmental path clearing; refer for binocular/depth evaluation
Cannot copy a graph, map, or math column layout	Dorsal	Pre-structured paper, spatial cueing; document spatial organization
Strong on movement tasks, weak on detail tasks	Ventral	Contrast this split explicitly in the present-level statement

Sorting a “what” problem from a “where” problem in the classroom. Stream language is for your reasoning; the documentation stays in occupational terms.

These are performance patterns to describe and refer on, not a basis for naming a stream-specific diagnosis.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Bumping into furniture, misjudging distances, poor spatial awareness in the room
Difficulty locating an item visually even when it is in plain sight
Trouble copying spatial layouts — maps, graphs, math columns, diagrams
Balance, posture, or motor-planning concerns alongside the visual complaint

Say this

Frame the slide: "What a dorsal-stream (magnocellular) signature looks like in class."

Walk each point, one sentence each:

• Bumping into furniture, misjudging distances, poor spatial awareness in the room

My notes

2.11 — We do not treat tracts — we treat the functional components

Teaching slide

Scope

We do not treat tracts — we treat the functional components

The magnocellular and parvocellular tracts describe transmission: how visual information travels from retina to cortex. That is anatomy and physiology, and it is outside what OT assesses or changes.
OT works one layer up, on the functional components the tract supports — fixation stability, saccadic accuracy, place-keeping, contrast and motion tolerance, discrimination, visual memory.
The intervention target is always a functional component plus the task and environment: contrast and print adaptation, graded near-work load, pacing, reduced visual clutter, compensatory access.
Never write, say, or imply that OT intervention improves, trains, strengthens, or repairs a pathway, or that a VPA™ result identifies a magnocellular deficit.
The measured outcome stays in the occupation — reading the passage, copying the assignment, crossing the parking lot — not in the pathway.

Occupations

What the person needs and wants to do.

• Reading and written work
• Dressing, eating, self-care
• Play, sport, driving, work

Client factors — body functions

The internal capacities that support doing.

• Visual acuity and visual field
• Eye-movement and focusing control
• Visual perception

Performance skills

Observable actions during the task.

• Locates, tracks, and keeps place
• Aligns, spaces, and copies accurately
• Sustains looking over time

Performance patterns

Habits and routines that carry the day.

• Break routines during near work
• Where materials live on the desk
• Self-checks before turning work in

Contexts and environment

Everything around the person.

• Lighting, glare, seating
• Print size, contrast, clutter
• Team expectations and supports

Highlighted boxes are where a visual problem shows up in our documentation: a client factor we describe, a performance skill we measure in the task, and a context we change. The diagnosis of the eye itself sits outside this picture — that belongs to eye care.

The OT practice framework, drawn as the pieces we actually observe. Vision touches three of them directly — client factors, performance skills, and context — which is why vision work is ordinary OT, not a specialty add-on.

Applies anywhere in the pathway is named: courses, slides, reports, and IEP language.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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The magnocellular and parvocellular tracts describe transmission: how visual information travels from retina to cortex. That is anatomy and physiology, and it is outside what OT assesses or changes.
OT works one layer up, on the functional components the tract supports — fixation stability, saccadic accuracy, place-keeping, contrast and motion tolerance, discrimination, visual memory.
The intervention target is always a functional component plus the task and environment: contrast and print adaptation, graded near-work load, pacing, reduced visual clutter, compensatory access.
Never write, say, or imply that OT intervention improves, trains, strengthens, or repairs a pathway, or that a VPA™ result identifies a magnocellular deficit.
The measured outcome stays in the occupation — reading the passage, copying the assignment, crossing the parking lot — not in the pathway.

Say this

Frame the slide: "We do not treat tracts — we treat the functional components."

Walk each point, one sentence each:

• The magnocellular and parvocellular tracts describe transmission: how visual information travels from retina to cortex. That is anatomy and physiology, and it is outside what OT assesses or changes.

My notes

2.12 — Where the two streams sit in a level-based visual performance framework

Five-Level Framework

Framework link

Where the two streams sit in a level-based visual performance framework

Visual Acuity & Sensory Foundation

Can the visual signal get in clearly enough to use?

Visual Efficiency

Magnocellular/dorsal load shows here first — fixation stability, saccadic return, place-keeping.

Visual Processing

Parvocellular/ventral identification lives here — discrimination, form constancy, figure-ground.

Visual-Motor Integration

Translating what is seen into graded, accurate motor output.

Functional Integration

Reading, writing, and task performance under real classroom demand.

Module 2 operates at Levels 2 and 3. A stream-based observation is always reported as a Level 2–3 performance description, never as a stream diagnosis.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Level 1 — Visual Acuity & Sensory Foundation: Can the visual signal get in clearly enough to use?
Level 2 — Visual Efficiency: Magnocellular/dorsal load shows here first — fixation stability, saccadic return, place-keeping.
Level 3 — Visual Processing (focus): Parvocellular/ventral identification lives here — discrimination, form constancy, figure-ground.
Level 4 — Visual-Motor Integration: Translating what is seen into graded, accurate motor output.
Level 5 — Functional Integration: Reading, writing, and task performance under real classroom demand.

Say this

Run the five levels bottom-up.

Spend your time on Level 3 — that is the point of this slide.

My notes

2.13 — Module 2 video — how the brain splits visual processing

Video

Lecture

Module 2 video — how the brain splits visual processing

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Narrated walkthrough connecting stream anatomy to functional classroom signs.

Say this

Set up the clip in one sentence, play it, then debrief with "what did you notice?"

My notes

2.14 — Beyond 20/20 — the Visual Performance System™

Visual

Framework

Beyond 20/20 — the Visual Performance System™

Level 1 Visual Access → Level 2 Visual Efficiency → Level 3 Visual Processing → Level 4 Visual-Motor Integration → Level 5 Functional Integration.

Each level rests on the one below it. Level 1 is Visual Access — acuity, contrast, fields, lighting, magnification.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Level 1 Visual Access → Level 2 Visual Efficiency → Level 3 Visual Processing → Level 4 Visual-Motor Integration → Level 5 Functional Integration.

Say this

Talk over the visual: "Beyond 20/20 — the Visual Performance System™."

Say the caption in your own words: Level 1 Visual Access → Level 2 Visual Efficiency → Level 3 Visual Processing → Level 4 Visual-Motor Integration → Level 5 Functional Integration.

My notes

2.15 — Sorting a "what" problem from a "where" problem

Case

Application

Sorting a "what" problem from a "where" problem

A 3rd-grade student reads individual words accurately in isolation but cannot find her place after looking up from the page, and she frequently loses items placed directly in front of her on a busy desk.

Q1.Which stream does this description sound more consistent with, and what would you probe next to confirm it?
Q2.How would you phrase this finding for a teacher without naming a "dorsal stream deficit"?

What you observe	More consistent with	Next OT move
Slow, effortful letter or sight-word recognition	Ventral	Describe identification accuracy and rate; reduce visual detail load
Confuses visually similar letters past expected age	Ventral	Sample discrimination directly; refer if acuity untested this year
Loses place returning from board to page	Dorsal	Line marker, copy-reduction; screen saccades and fixation stability
Bumps furniture, misjudges distance in transitions	Dorsal	Environmental path clearing; refer for binocular/depth evaluation
Cannot copy a graph, map, or math column layout	Dorsal	Pre-structured paper, spatial cueing; document spatial organization
Strong on movement tasks, weak on detail tasks	Ventral	Contrast this split explicitly in the present-level statement

Sorting a “what” problem from a “where” problem in the classroom. Stream language is for your reasoning; the documentation stays in occupational terms.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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A 3rd-grade student reads individual words accurately in isolation but cannot find her place after looking up from the page, and she frequently loses items placed directly in front of her on a busy desk.
Q1. Which stream does this description sound more consistent with, and what would you probe next to confirm it?
Q2. How would you phrase this finding for a teacher without naming a "dorsal stream deficit"?

Say this

Read the scenario aloud, slowly:

Then put these questions to the room:

My notes

2.16 — What a spatial ("where") breakdown looks like on the page

Before / after

Work sample

What a spatial ("where") breakdown looks like on the page

Blank paper — no spatial reference

The student has to generate placement, size, and direction with no external structure.

• The line drifts upward across the page.
• Letter size and orientation shift mid-sentence; several letters reverse.
• Spacing is unpredictable — the "where" system is doing unsupported work.

Lined paper — visual stability points supplied

Same sentence, same student, with baseline and line-to-line reference restored.

• The line holds horizontal; drift disappears.
• Letter size normalizes against the ruling.
• Word spacing becomes consistent and readable.

When performance changes because the environment supplied the spatial reference, you are looking at a spatial ("where") demand, not a word-knowledge ("what") problem.

De-identified student samples, used with permission.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Blank paper — no spatial reference: The student has to generate placement, size, and direction with no external structure. · The line drifts upward across the page. · Letter size and orientation shift mid-sentence; several letters reverse. · Spacing is unpredictable — the "where" system is doing unsupported work.
Lined paper — visual stability points supplied: Same sentence, same student, with baseline and line-to-line reference restored. · The line holds horizontal; drift disappears. · Letter size normalizes against the ruling. · Word spacing becomes consistent and readable.
Takeaway: When performance changes because the environment supplied the spatial reference, you are looking at a spatial ("where") demand, not a word-knowledge ("what") problem.

Say this

Set up the contrast: "What a spatial ("where") breakdown looks like on the page."

Point at the before panel first. The student has to generate placement, size, and direction with no external structure.

Then the after panel. Same sentence, same student, with baseline and line-to-line reference restored.

My notes

2.17 — So what? Vision shows up as behavior first

So what?

So what? Vision shows up as behavior first

You will almost never be handed a vision complaint. You will be handed avoidance, sloppiness, slowness, or "not trying."

Children rarely report a visual world they have always had. They report what it costs them, in behavior.

What you do with it

Translate the referral complaint into an observable visual demand.
Compare performance across distance, duration, and layout before judging effort.
Give the team the behavioral signature in writing so it stops being a character description.

Watch for

Consistent avoidance of one occupation while a similar-difficulty task with lower visual load is fine.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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You will almost never be handed a vision complaint. You will be handed avoidance, sloppiness, slowness, or "not trying."
Because: Children rarely report a visual world they have always had. They report what it costs them, in behavior.
Move: Translate the referral complaint into an observable visual demand.
Move: Compare performance across distance, duration, and layout before judging effort.
Move: Give the team the behavioral signature in writing so it stops being a character description.
Watch for: Consistent avoidance of one occupation while a similar-difficulty task with lower visual load is fine.

Say this

Land the "so what": You will almost never be handed a vision complaint. You will be handed avoidance, sloppiness, slowness, or "not trying."

Explain the mechanism plainly: Children rarely report a visual world they have always had. They report what it costs them, in behavior.

Then give them the moves — say each one as something they can do Monday:

My notes

2.18 — Postural setup changes what you are measuring

Before / after

Change the setup

Postural setup changes what you are measuring

Before — unsupported

Feet unsupported, trunk collapsed, page about 15 cm from the eyes.

• Near demand is far higher than the task requires
• Fatigue and avoidance appear within minutes

After — supported

Feet supported, hips back, page raised toward a slant, working distance near Harmon distance.

• Working distance is now a controlled variable, not a confound
• Endurance findings become interpretable

Fix posture and distance before you score anything. Otherwise you are documenting the setup, not the student.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Before — unsupported: Feet unsupported, trunk collapsed, page about 15 cm from the eyes. · Near demand is far higher than the task requires · Fatigue and avoidance appear within minutes
After — supported: Feet supported, hips back, page raised toward a slant, working distance near Harmon distance. · Working distance is now a controlled variable, not a confound · Endurance findings become interpretable
Takeaway: Fix posture and distance before you score anything. Otherwise you are documenting the setup, not the student.

Say this

Set up the contrast: "Postural setup changes what you are measuring."

Point at the before panel first. Feet unsupported, trunk collapsed, page about 15 cm from the eyes.

Then the after panel. Feet supported, hips back, page raised toward a slant, working distance near Harmon distance.

My notes

2.19 — Two-minute case: effort or demand?

Mini case

Two-minute case

Two-minute case: effort or demand?

A Grade 3 student completes math facts on a whiteboard quickly, but produces almost nothing on the same problems given as a dense worksheet.

What does that difference tell you, and what do you trial first?

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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A Grade 3 student completes math facts on a whiteboard quickly, but produces almost nothing on the same problems given as a dense worksheet.
Question: What does that difference tell you, and what do you trial first?
Model answer: The math skill is intact; the visual demand of the page is the variable. Trial the same items with enlarged print, fewer items per page, and a line guide. If output normalizes, document a demand mismatch and modify the page while you investigate efficiency.
Teaching point: When the same content succeeds in one visual format and fails in another, look at the format first.

Say this

Two-minute case. Read it aloud:

A Grade 3 student completes math facts on a whiteboard quickly, but produces almost nothing on the same problems given as a dense worksheet.

Put the question to them: "What does that difference tell you, and what do you trial first?" Give 60 seconds, no talking.

My notes

2.20 — Reflect and share

Reflection

Reflect and share

Choose one student. Describe one behavior that looks like a "what" problem and one that looks like a "where" problem.

THINKPROCESSSHARE

· Use only the language of classroom performance, not stream labels.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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Choose one student. Describe one behavior that looks like a "what" problem and one that looks like a "where" problem.
Use only the language of classroom performance, not stream labels.
Starter: A "what" problem looks like... A "where" problem looks like...

Say this

Reflection prompt: "Choose one student. Describe one behavior that looks like a "what" problem and one that looks like a "where" problem."

Cues:

• Use only the language of classroom performance, not stream labels.

My notes

2.21 — Knowledge check — streams

Self-check

Knowledge check

Knowledge check — streams

A student reads words accurately but cannot copy from a spatial diagram. Which description fits best?

Self-check only — it does not affect your post-course quiz score.

Why Visual Performance Matters: Foundations for Occupational Therapy Practice

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A student reads words accurately but cannot copy from a spatial diagram. Which description fits best?
– Ventral stream problem — difficulty identifying details
✓ Dorsal stream problem — difficulty with spatial layout and mapping
– Both streams are equally affected
– The student is not trying hard enough
Rationale: Difficulty copying spatial layouts, maps, and diagrams is consistent with a dorsal / spatial-mapping pattern. Accurate word reading suggests the ventral identification stream is relatively intact.

Say this

Knowledge check: "A student reads words accurately but cannot copy from a spatial diagram. Which description fits best?"

Options:

• Ventral stream problem — difficulty identifying details

My notes