There are several different types of cataract, and each type can affect the vision in different ways. If the lens in an eye has a cataract, there is usually more than one type of cataract present.
Cataracts generally can blur the vision and can change a glasses prescription.
They also can create glare problems, sometimes worse during the day and sometimes worse at night. Other visual effects of cataract include changes in color vision, halos around lights, and double vision. Cortical cataract - this is a haze present usually on the front surface of the lens which often is in a wedge shape. This can cause certain parts of the vision to be blurry, and can create glare problems. Posterior subcapsular cataract - this is a cataract found on the back surface of the lens.