Vision Conditions

colorblind.jpgThe conditions listed below affect the way a child sees, and require a comprehensive eye exam for accurate diagnosis and treatment.  

Astigmatism is due to either the irregular shape of the cornea, the clear front cover or “window” of the eye, or the curvature of the lens inside the eye, causing blurred vision. An irregularly shaped cornea or lens prevents light from focusing properly on the retina, the light sensitive surface at the back of the eye. As a result, vision becomes blurred at any distance.  It is common to have some degree of astigmatism. Slight amounts of astigmatism don't usually affect vision or require treatment. However, larger amounts cause distorted or blurred vision, eye discomfort and headaches.

Color Vision Deficiency is the inability to distinguish certain shades of color or in more severe cases, see colors at all. The term "color blindness" is also used to describe this visual condition, but very few people are completely colorblind.
Most people with color vision deficiency can see colors, but they have difficulty differentiating most commonly between particular shades of reds and greens and least commonly between shades of blues and yellows.  People who are totally colorblind, a condition called achromatopsia, can only see things as black and white or in shades of gray.  The severity of color vision deficiency can range from mild to acute depending on the cause. It will affect both eyes if inherited and usually just one if the cause for the deficiency is injury or illness.

Hyperopia, known as farsightedness, is a vision condition in which distant objects are in focus, but close ones are blurry. Farsightedness occurs if your eyeball is too short or the cornea has too little curvature, so light entering your eye is not focused correctly.  Common signs of farsightedness include difficulty concentrating and maintaining clear focus on nearby objects, eye strain, fatigue and/or headaches after close work, aching or burning eyes and irritability or nervousness after sustained concentration.

Myopia, known as nearsightedness, is a vision condition in which close objects are seen clearly, but objects farther away appear blurry.  Nearsightedness occurs if the eyeball is too long or the cornea, the clear front cover of the eye, has too much curvature. As a result, light entering the eye isn’t focused correctly, making distant objects look blurred.  Nearsightedness is very common, affecting nearly 30 percent of the U.S. population. Some research supports the theory that nearsightedness is hereditary.  There is also growing evidence that it is influenced by the visual stress of too much close work.  A common sign of nearsightedness is difficulty clearly seeing distant objects such as a movie or TV screen or the chalkboard in school.