An ophthalmic surgeon is trained to examine, diagnose and treat eye diseases, correct vision, prescribe medication and perform eye surgery. He can also prescribe glasses and medical lenses for patients. If you suffer from eye problems such as glaucoma, macular degeneration or cataracts, you need to see an ophthalmologist. After a thorough examination, the specialist will treat the patient with medication, surgery, or both.
Ophthalmology is a branch of medicine and surgery which deals with the diagnosis and treatment of eye disorders. An ophthalmologist is a specialist in ophthalmology. The credentials include a degree in medicine, followed by additional four to five years of ophthalmology residency training.
hey recognized the sclera and transparent cornea running flushly as the outer coating of the eye, with an inner layer with pupil, and a fluid at the centre. It was believed, by Alcamaeon (5th century BC) and others, that this fluid was the medium of vision and flowed from the eye to the brain by a tube. Aristotle advanced such ideas with empiricism. He dissected the eyes of animals, and discovering three layers (not two), found that the fluid was of a constant consistency with the lens forming (or congealing) after death, and the surrounding layers were seen to be juxtaposed. He and his contemporaries further put forth the existence of three tubes leading from the eye, not one. One tube from each eye met within the skull.
The Greek physician Rufus of Ephesus (1st century AD) recognised a more modern eye, with conjunctiva, extending as a fourth epithelial layer over the eye. Rufus was the first to recognise a two-chambered eye, with one chamber from cornea to lens (filled with water), the other from lens to retina (filled with an egg white-like substance).
Celsus the Greek philosopher of the 2nd century AD gave a detailed description of cataract surgery by the couching method.
The Greek physician Galen (2nd century AD) remedied some mistakes including the curvature of the cornea and lens, the nature of the optic nerve, and the existence of a posterior chamber. Though this model was a roughly correct modern model of the eye, it contained errors. Still, it was not advanced upon again until after Vesalius. A ciliary body was then discovered and the sclera, retina, choroid, and cornea were seen to meet at the same point. The two chambers were seen to hold the same fluid, as well as the lens being attached to the choroid. Galen continued the notion of a central canal, but he dissected the optic nerve and saw that it was solid. He mistakenly counted seven optical muscles, one too many. He also knew of the tear ducts.