describle two vision disorders that cause abnormal eyeballshape.
give examples of the various tissue types that exist in your arm. please help me test monday.
which membrance surround and protect the vital organs in the chest cavity?
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http://www.google.com/search?hl=en&sa=X&ei=kPEgTvO2HqyCsAKUtIiVAw&ved=0CBgQvwUoAQ&q=vision+disorders+that+cause+abnormal+eyeball+shape&spell=1&biw=1191&bih=614
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Read widely in the search results above -- and take good notes.
Don't you mean two abnormal eyeball shapes that cause vision disorders? The vision disorders do not cause abnormal eyeball shape.
Two vision disorders that cause abnormal eyeball shape are myopia (nearsightedness) and hyperopia (farsightedness). These disorders result in refractive errors, where the eyeball shape prevents light from properly focusing on the retina.
1. Myopia (nearsightedness): In myopia, the eyeball is elongated, causing the cornea to have too much curvature or the focusing power of the lens to be too strong. This results in light rays focusing in front of the retina rather than directly on it. As a result, distant objects appear blurred, while close objects are seen more clearly.
2. Hyperopia (farsightedness): In hyperopia, the eyeball is shorter or flatter than normal, or the cornea and lens have less focusing power. This causes light rays to focus behind the retina, rather than directly on it. As a result, close objects may appear blurred, while distant objects are seen more clearly.
To diagnose these vision disorders, an eye examination by an optometrist or ophthalmologist is necessary. The eye care professional will perform tests like visual acuity, refraction, and examination of the eye's structure to determine the abnormal eyeball shape and the degree of the refractive error. Based on the findings, corrective measures like glasses, contact lenses, or refractive surgery may be recommended to improve vision.