Eye Conditions - California Optometric Association
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Eye Help for the Public


Eye Conditions

Eye Conditions

Most people have some degree of astigmatism — a vision condition that occurs when the front surface of your eye — the cornea — is slightly irregular in shape.  

Blepharitis is a chronic or long term inflammation of the eyelids and eyelashes.  

Blurred or distorted vision may be caused by a cataract — a clouding of all or part of the normally clear lens within your eye.  

Color Vision Deficiency
Many people – about 8% of men and 1% of women – have difficulty distinguishing between some colors and shades. This is called color vision deficiency. 

Conjunctivitis is an inflammation of the conjunctiva, the thin, transparent layer that lines the inner eyelid and covers the white part of the eye. 

Cross-Eyes (Strabismus)
Crossed-eyes (strabismus) occurs when one or both of your eyes turns in, out, up or down, usually caused by eye muscle control.  

Diabetic Retinopathy
People who have diabetes, a disease that interferes with the body's ability to use and store sugar, usually have many other health problems associated with the disease.  

Dry Eye
Dry eye means that your eyes do not produce enough tears or that you produce tears which do not have the proper chemical composition.   

Eye Coordination Problems
Eye coordination is the ability of both eyes to work together as a team – it is a skill that must be developed and keeps the eyes in proper alignment.  

Glaucoma is an eye disease in which the internal pressure in the eyes increases enough to damage the nerve fibers in the optic nerve and cause vision loss.   

Farsightedness (Hyperopia)
Farsightedness, or hyperopia, is a vision condition in which distant objects are usually seen clearly, but close ones do not come into proper focus.  

Sometimes the front part of the eye called the cornea which is normally round becomes thin and irregularly- or cone-shaped.  

Lazy Eye (Amblyopia)
Lazy eye, or amblyopia, is the loss or lack of development of central vision in one eye — it is often associated with crossed-eyes or a large difference in the degree of nearsightedness or farsightedness between the two eyes.   

Macular Degeneration
Macular degeneration results from changes to the macula, a portion of the retina that is responsible for clear, sharp vision and is located at the back of the eye.   

Nearsightedness (Myopia)
Nearsightedness, or myopia, is a very common vision condition that affects nearly 30% of the U.S. population.   

Ocular Hypertension
Ocular hypertension, which has no noticeable signs or symptoms, is an increase in the pressure in the eyes above the normal range with no detectable changes in vision or damage to the structure of the eye.  

Presbyopia is a vision condition in which the crystalline lens of the eye loses its flexibility making it difficult to focus on close objects.   

Spots and Floaters
Spots (often called floaters) are small, semi-transparent or cloudy specks or particles within the vitreous — the clear, jelly-like fluid that fills the inside of the eyes.  



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