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Hyperopia print that page

People with hyperopia can experience blurred vision , asthenopia , accommodative dysfunction , binocular dysfunction , amblyopia , and strabismus . [ 1 ] Hyperopia is often confused with presbyopia , [ 2 ] [ 3 ] another condition that frequently causes blurry near vision. [ 4 ] Presbyopes

wikipedia.org | 2011/4/21 7:22:21

Glasses print that page


Historical types of glasses include the pince-nez , monocle , lorgnette , and scissor or scissors-glasses . Modern glasses are typically supported by pads on the bridge of the nose and by temple arms (sides) placed over the ears . CR-39 lenses are the most common plastic lenses due to their

Amblyopia print that page


congenital cataracts , by strabismus (misaligned eyes), anisometropia (different degrees of myopia or hypermetropia in each eye), or by a significant amount of astigmatism in one or both eyes. [ edit ] Strabismic amblyopia Main article: Strabismus

Lenticular lens print that page


considered a simple example. Lenticular eyeglass lenses have been employed to correct extreme hypermetropia (farsightedness), a condition often created by cataract surgery when lens implants are not possible. To limit the great thickness and weight that such high-power lenses would otherwise

Underwater vision print that page


The crystalline lenses of fishes' eyes are extremely convex , almost spherical, and their refractive indices are the highest of all the animals. These properties enable proper focusing of the light rays and in turn proper image formation on the retina. This convex lens gives the name to the

Contact lens print that page


A contact lens (also known simply as contacts for a pair) is a corrective , cosmetic , or therapeutic lens usually placed on the cornea of the eye . Leonardo da Vinci is credited with describing and sketching the first ideas for contact lenses in 1508, but it was more than 300 years later

Scuba diving print that page


Unlike early diving, which relied exclusively on air pumped from the surface , scuba divers carry their own source of breathing gas (usually compressed air ), [ 3 ] allowing them greater freedom than with an air line . Both surface supplied and scuba diving allow divers to stay underwater

History of radiation therapy print that page


The history of radiation therapy or radiotherapy can be traced back to experiments made soon after the discovery of x-rays (1895), when it was shown that exposure to radiation produced cutaneous burns . Influenced by electrotherapy and escharotics — the medical application of caustic

Christian Georg Theodor Ruete print that page

of the eye. Ruete also did extensive research of ophthalmic disorders such as strabismus and hypermetropia . [ 1 ] In 1846 Ruete published Lehrbuch der Ophthalmologie which provided the first illustration of a visual migraine aura in European medical literature. In this book he pictorially

wikipedia.org | 2010/9/25 21:26:07

Glaukomflecken print that page

closure glaucoma, sign for the latter can be present such as shallow anterior chamber, closed angle, hypermetropia etc [ 5 ] . [ edit ] Case Example and Image Glaucomflecken in primary acute angle closure glaucoma [ 6 ] . [ edit ] References ^ Dr Khairul Nazri Mohammad (Articles' Author

wikipedia.org | 2010/9/25 4:51:10