Causes of optical visual impairments include

• A. Diseases or conditions affecting the eye
• B. Injury to brain
• C. Hearing loss
• D. Nutritional deficiency

Answer: (A)

Optical visual impairment comes from problems inside the eye’s own structures or optics. When diseases or conditions affect the eye, light isn’t formed or focused properly on the retina, so vision is reduced. Examples include cataracts changing the lens, glaucoma affecting the optic nerve, macular degeneration altering retinal function, corneal damage, or refractive errors that misfocus light. These eye-centered causes directly produce optical impairment, which is why this option fits best. In contrast, injuries to the brain affect vision through processing rather than the eye’s optics, and while nutritional issues can influence eye health, they’re not the primary optical causes of impairment.