Low Vision Rehabilitation — MCQs

Q: A patient with age-related macular degeneration complains of difficulty reading despite using glasses. Which assistive device is most appropriate to enhance their reading ability?

Magnifying glass. ***Magnifying glass*** - **Magnifying glass** is the most appropriate low vision aid for reading in **age-related macular degeneration (ARMD)**. - ARMD causes **central vision loss** (scotoma), making reading difficult despite correct refractive correction. - Magnification devices **enlarge the retinal image**, allowing patients to use their **peripheral retina** to see enlarged text. - Handheld and stand magnifiers are **first-line assistive devices** in low vision rehabilitation for ARMD patients. *Bifocal glasses* - Bifocal glasses correct **presbyopia** (age-related loss of accommodation) for both distance and near vision. - They do **not provide magnification** beyond standard refractive correction. - They cannot compensate for the **central scotoma** caused by macular degeneration. *Contact lenses* - Contact lenses correct **refractive errors** (myopia, hyperopia, astigmatism) but do not magnify. - They offer the same refractive correction as glasses but in a different format. - They do **not address the central vision loss** from ARMD that requires magnification. *Intraocular lens* - **Intraocular lens (IOL)** is implanted during **cataract surgery** to replace the clouded natural lens. - While multifocal IOLs can improve near and distance vision, they do not provide the significant **magnification needed** for severe central vision loss. - IOL implantation is **not a treatment for ARMD**, though patients with ARMD may also have cataracts requiring surgery.

Q: According to WHO ICD-11 classification, visual impairment in the better eye (with best correction) begins at a visual acuity worse than:

6/12. ***6/12*** - According to the **WHO ICD-11 classification**, visual impairment begins when visual acuity is **less than 6/12** in the better eye with best correction. - This threshold marks the beginning of **mild visual impairment** (visual acuity < 6/12 to ≥ 6/18). - Visual acuity of 6/12 or better is considered **normal vision** without significant impairment. *6/24* - Visual acuity of **6/24** falls within the **moderate visual impairment** category (< 6/18 to ≥ 6/60). - This represents established visual impairment but is not the threshold where impairment begins. *6/36* - Visual acuity of **6/36** also falls within the **moderate visual impairment** range. - This indicates more significant vision loss than the threshold that defines the beginning of visual impairment. *6/60* - Visual acuity of **6/60 or worse** (< 6/60 to ≥ 3/60) is classified as **severe visual impairment**. - Visual acuity worse than 3/60 is classified as **blindness**. - This represents much more severe vision loss than the initial threshold for visual impairment.

Practice by Chapter

Definition and Classification of Low Vision

Practice Questions

Assessment of Low Vision Patients

Practice Questions

Optical Low Vision Aids

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Non-optical Low Vision Aids

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Electronic Low Vision Devices

Practice Questions

Rehabilitation Strategies

Practice Questions

Psychological Aspects of Visual Impairment

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Orientation and Mobility Training

Practice Questions

Occupational Therapy in Low Vision

Practice Questions

Pediatric Low Vision Rehabilitation

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Legal Aspects of Visual Impairment

Practice Questions

Emerging Technologies in Low Vision

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