The IMO 
Your eyes
Visual test
Detection of eye diseases.
There are many eye diseases that affect vision. Here are some examples of what your vision would be like if you had any of these conditions.
Cataract
Crystalline lens opacity
Original
Normal vision
Affected eye vision
Astigmatism
Distorted objects at all distances
Original
Normal vision
Affected eye vision
Glaucoma
Progressive damage to the optic nerve resulting in a reduction of the visual field.
Original
Normal vision
Affected eye vision
AMD
Age-related macular degeneration affects de macula, therefore, worsening our central vision.
Original
Normal vision
Affected eye vision
Diabetic retinopathy
Diabetic retinopathy is an eye disease resulting from diabetes and a major cause of vision loss.
Original
Normal vision
Affected eye vision
Retinitis pigmentosa
Retinitis pigmentosa affects the functioning of photoreceptor cell and the pigment epithelium and gradually reduces vision.
Original
Normal vision
Affected eye vision
Retinal detachment
Ths symptoms of retinal detachment are the appearence of flashes of light (photopsia) or floaters in the vitreous space or, occasionally, a progressive shadow and vision loss.
Original
Normal vision
Affected eye vision
Floaters and flashes
Floaters are tiny pieces or cells from the vitreous humour that have become detached from the back of the eye.
Original
Normal vision
Affected eye vision
Diplopia
Diplopia or double vision occurs when the eyes are not aligned and each one sends a different image to the brain.
Original
Normal vision
Affected eye vision