Back to CEU courses
Facilitator notes Media shot list

Why Visual Performance Matters: Foundations for Occupational Therapy Practice — participation guide

3 contact hours · 0.3 AOTA CEUs · Module 5 — follow along, take notes, and complete the reflection prompts.

Module 5

The Low-Vision Service Model

Anchor concept

Adaptation is intervention. You do not wait for the eye exam to make the task usable.

Follow along

What this module covers

  • Two categories of clients drive two different plans
  • Lighting is a modifiable variable, not a fixed constraint
  • Positioning the student inside the room
  • Low vision: what OT addresses, and when OT refers
  • Organization, mobility, and multisensory support

Key ideas

Capture these as you listen

  • The low-vision model has four levels: increase visibility, enhance with magnification, augment with another channel, substitute with another channel.
  • Environmental modifications (lighting, glare, contrast, size, typeface, seating) are core OT interventions.
  • Modifications must be selected for a specific occupation and goal, not applied generically.
  • OTs do not diagnose low vision or prescribe optical devices; we partner with eye care providers and document functional outcomes.

Notes

My notes for this module

Reference figures

Keep these for practice

What those contrast values actually look like

Circle the word that names the picture.

~90% contrast — Black on white — target for worksheets and labels.

Circle the word that names the picture.

~70% contrast — Typical newspaper / textbook print.

Circle the word that names the picture.

~40% contrast — Faded photocopy — many classroom handouts land here.

Circle the word that names the picture.

~10% contrast — Low-contrast worksheet; effectively inaccessible.

Circle the word that names the picture.

Reverse contrast — white on dark; often preferred with glare or photophobia.

Circle the word that names the picture.

Tinted background — trial it; keep it only if performance measurably improves.

The same sentence at descending contrast. Access fails long before the text disappears for a typically sighted adult — check the handout, not just the eye. Reverse contrast (light on dark) helps many students with glare sensitivity or media opacities.

Magnification options, side by side

Illuminated handheld optical magnifier held above a printed worksheet, enlarging a block of text through the lens
Handheld: portable spot use; the student controls focal distance.
Dome stand magnifier and bar magnifier resting directly on an open book page at a fixed focal distance
Stand / bar: lens sits on the page — fixed focus, steady for sustained reading.
Tablet and smartphone on a desk displaying greatly enlarged high-contrast text using built-in accessibility zoom
Electronic / built-in digital: adjustable power, contrast, and speech.

Handheld magnifier

Short spot tasks: price tags, labels, a single line of text.

Portable and cheap; requires a steady hand and short focal distance.

Stand magnifier

Sustained near work for students with tremor or poor motor control.

Fixed focal distance holds the lens steady; less portable, needs desk space.

Hands-free / spectacle

Writing and bimanual tasks where both hands must stay free.

Prescribed by the eye care team; very short working distance at high power.

Telescope (mono/binocular)

Distance targets: the board, signage, a demonstration across the room.

Spot use only — narrow field, not for travel or continuous viewing.

Electronic / video magnifier (CCTV)

Long reading and writing sessions; textbooks, worksheets, science labs.

Adds adjustable magnification, reverse contrast, and speech; cost and setup.

Built-in digital magnification

Phone/tablet zoom, text enlargement, VoiceOver, screen readers.

Already in the student’s hands and free; teach it before purchasing hardware.

Match the device to the task, not to the diagnosis. Higher power means a shorter working distance and a narrower field — students usually need more than one option across the day.

Where low vision sits in the framework

Module 1 — Vision as a gateway system

12345

Frames the whole system; every level is introduced.

Module 2 — Visual pathways (ventral / dorsal)

12345

Magnocellular/dorsal work shows at Level 2 efficiency; parvocellular/ventral identification is Level 3 processing.

Module 3 — Underlying Conditions vs. Functional Limitations

12345

Ocular and neurological conditions act on the sensory foundation and on binocular efficiency; OT treats the functional limitation, not the diagnosis.

Module 4 — Comorbidity patterns

12345

Autism, ADHD, dyslexia, dysgraphia signatures appear as processing and visual-motor integration performance.

Module 5 — Low-vision service model

12345

Low vision is a Level 1 sensory-foundation problem. Contrast, lighting, and magnification restore access at the floor; the Level 5 change is the downstream result, not the target.

Module 6 — Where this goes next

12345

Functional integration is where all findings resolve into a plan of care.

L1 · Acuity & sensory foundationL2 · Visual efficiencyL3 · Visual processingL4 · Visual-motor integrationL5 · Functional integration
Which level of the framework each module is actually operating on. Use this to keep the module content, the slide framework references, and your documentation language aligned.

Apply it

Case prompt

A high school student with albinism needs to read a textbook and navigate the hallway. Name one modification for each of the four low-vision levels for each goal.

Practice

Mini exercise

Choose one low-vision level and write a one-sentence accommodation for a student in your caseload or a hypothetical case.

Take it to work

Action step this week

Walk through one classroom in your building and list three environmental changes that would increase visibility for a student with reduced acuity or contrast sensitivity.