Please explain the main symptoms to detect cataract in eyes.

Cataract. Cataracts may cause glare or haloes while night driving, trouble reading even with glasses, or difficulty seeing in bright sunshine. Each person may experience a cataract differently.
Blurred vision. Vision changes, such as halos around lights at night, are common. Some people have the sensation of looking through a dirty piece of glass.
Mostly no symptoms. Cataracts usually develop so slowly that you dont notice any problems with vision. Cataracts are opacities that occur in our lens. Symptoms usually occur late such as decreased visual acuity and changes in the sharpness of color.