hemeralopia

One common trait is hemeralopia or blindness in full sun.

Photophobia-The avoidance of bright light by those suffering from hemeralopia.

Yet another cause of hemeralopia is uni- or bilateral post chiasmatic brain injury.

People with hemeralopia may benefit from sunglasses.

The opposite problem, the inability to see in bright light, is known as hemeralopia and is much rarer.

Alaskan Malamute - Temporary loss of vision in daylight (hemeralopia) at eight to ten weeks old.

Central Cataracts, due to the lens clouding, disperses the light before it can reach the retina, is a common cause of hemeralopia and photoaversion in elderly.

Rarely it may have ocular complications such as hemeralopia, pigmentary chorioretinitis, optic atrophy or retinal/iris coloboma, having a serious effect on the person's vision.

C.A.R (Cancer Associated Retinopathy) seen when certain cancers release deleterious antibodies against retinal structures, may cause hemeralopia.

In addition to Adamantiades-Behçet's disease, Adamantiades described the interstitial keratitis in trachomatic patients to be a bacterial infection and classified the epidemic idiopathic hemeralopia.

In hemeralopia, daytime vision gets worse, characterised by photoaversion (dislike/avoidance of light) rather than photophobia (eye discomfort/pain in light) which is typical of inflammations of eye.

Nighttime vision largely remains unchanged due to the use of rods as opposed to cones (during the day), which are affected by hemeralopia and in turn degrade the daytime optical response.

Ocular complications, though rare, are listed as optic atrophy, microphthalmia, pigmentary chorioretinitis, hemeralopia (decreased vision in bright light), myopia, strabismus, nystagmus and iris/retinal coloboma.