vision problems

• visual activity


  sharpness of vision or the ability to discriminate usual details which can be measured through a Snellen chart
• nearsightedness or myopia


  a condition where a person is capable of seeing nearby objects with greater activity than distant objects
• farsightedness or hyperopia


  a condition where a person can see distant objects with greater activity than nearby objects
• presbyopia


  a condition characterized by brittleness of the lens which usually begins at about the age of 38 to 46
• strabismus


  or crossed eye in which both eyes cannot focus on the same point at the same time
• astigmatism


  a visual disorder caused by abnormal curvature of the lens so that images are indistinct or distorted
• color blindness


  a condition in which person’s suffering from this are monochromats and sensitive to light to dark only