Acuity Objects look fuzzy Cataracts, Loss of detail, sensitivity (sharpness of and washed out nystagmus, myopia to glare, loss of depth view) perception Peripheral Similar to looking Glaucoma, Difficulty in moving down a tube or around, vision in poor retinitis pigmentosa narrow tunnel light Central field Objects looked at Macular disease, Difficulty with close work, directly are hazy or some of e.g. reading, and in missing, may retinitis pigmentosa recognising faces appear distorted Patchy or Hazy or blind spots Diabetic Difficulty with close work interrupted distributed across retinopathy or and in moving around, the visual field other retinal quantity and quality of distort the view damage vision often varies Total, or light No at all can Congenital, No useful sight, so perception only be discriminated accident, alternative communication progressive disease methods are needed Implications for learning Because is the principle means of communicating and learning, visual impairment has significant implications for study. Studying is likely to take at least a third longer Active listening and concentrating when audio is speeded up are skills that have to be learnt
Acuity (sharpness of view) Objects look fuzzy and washed out Cataracts, nystagmus, myopia Loss of detail, sensitivity to glare, loss of depth perception Peripheral Similar to looking down a tube or narrow tunnel Glaucoma, retinitis pigmentosa Difficulty in moving around, vision in poor light Central field Objects looked at directly are hazy or missing, may appear distorted Macular disease, some of retinitis pigmentosa Difficulty with close work, e.g. reading, and in recognising faces Patchy or interrupted Hazy or blind spots distributed across the visual field distort the view Diabetic retinopathy or other retinal damage Difficulty with close work and in moving around, quantity and quality of vision often varies Total, or light perception only No at all can be discriminated Congenital, accident, progressive disease No useful sight, so alternative communication methods are needed Implications for learning Because is the principle means of communicating and learning, visual impairment has significant implications for study. Studying is likely to take at least a third longer Active listening and concentrating when audio is speeded up are skills that have to be learnt