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Depends: In most jurisdictions, an optometrist or ophthalmologist is required to generate a prescription for contact lenses. Some optical shops have an optometrist on site but those that do not cannot fit you without the prescription. Your best strategy is to see an ophthalmologist who has training in comprehensive eye diagnosis and treatment, and get a prescription for contacts. ...Read moreSee 1 more doctor answer
Clue to disease: The optic disc is the site at the back of the eye where the nerves of vision carry information to the brain. The color and contour (depth) can give the ophthalmologist clues as to the health of the nerve, whether there has been glaucoma damage, or nerve damage. It can also be a clue to intracranial pressure. A deep disc (cupping) can be normal but can be a sign of glaucoma. ...Read more
Disease of the eye: There are many 'lesions' affecting the vision and optics of the eye. Ophthalmologists speak of optic disease mostly when referring to the optic nerve. That can be damaged by trauma, multiple sclerosis, tumors, and some other rare conditions. Check with the doctor who used this term and see where your optic lesion is located and what that means for you. ...Read more
Inflammation of nerv: The optic nerve is the main cable carrying visual information from the eye to the brain. Optic neuritis is when this nerve gets inflamed and this usually lowers the vision in that eye. It frequently is spontaneous but can be caused by multiple sclerosis and certain drugs as a side effect. It is fortunately uncommon as it is a very unsettling condition. ...Read more
Orbital cellulitis: I think you mean orbital cellulitis, an infection of the orbital tissue surrounding the eye. This causes pain, limitation of eye motion and can severely damage the tissues and eventually the vision. Usually it is infectious and requires systemic antibiiotics. It may require a hospital admission. Rarely it is associated with tumors and other periocular pathology. ...Read moreSee 1 more doctor answer
It is: A congenital condition in which the optic nerve, the nerve between the eye and brain, does not develop properly. Vision can be normal or totally blind or anything in between. This can be associated with other congenital disorders and this possibility should be explored in the child. ...Read moreSee 1 more doctor answer
Probably not: Unless you have contact with toxic solvents, or in contact with drugs which cause arteritis or vasculitis, it is most likely that your work has nothing to do with the eye issue, and other causes should be considered. Have a thorough evaluation with first an ophthalmologist and later a neurologist. If an MRI of brain shows additional lesions, this may be early ms. ...Read more
Optic nerves: I would recommend seeing a neuro-ophtholmalogist to understand what you mean by optic nerves being enlarged. Are they symmetric or congenital? How was this deduced? ...Read more
Fibre length, overall signal attenuation for an optical link, coupling loss exam, what are these?
Optical. My dad is 88, he has trouble seeing on a bright sunny day. Is there anything that could help him?
Depends: Has he had an evaluation by an ophthalmologist. At his age there are several conditions that could cause this symptom including cataracts, glaucoma and macular degeneration. If he has not been seen, then make an appointment and help him go to the eye doctor. ...Read moreSee 1 more doctor answer
Can you go to an optical store and try on frames without an appointment, just to see if you like any of them?
Yes: These are retail outlets usually of the optometrist or ophthalmologist. They would love your business. You will need a current and valid prescription in most states to have them fill the prescription. The most they can say is no! Have at it. See if you and they are eye to eye and focus on your desires and don't be short sighted. ...Read more
I get flashing lights which blur my vision for about 30 min - best described as optical migraines. Why does this happen?
Optical migraines: You describe well the condition of ophthalmic migraines. Stress, fatigue, sometimes flashes of light or different lighting, certain foods or family history are all related to migraine. You may have hac migraines as a teenager. It is felt to be an inappropriate release of "neurotransmitters" causing spasm of blood vessels which give the auras you are describing. ...Read more
Eye structure: The optic disc is the structure at the back of the eye where the visual nerves come together to form the optic nerve and where blood vessels enter and exit the back of the eye. Its health and structure are clues to various diseases such as multiple sclerosis, glaucoma and other conditions. ...Read moreSee 1 more doctor answer
Visual cable: The optic nerve, the head of which is described in the back of the eye by your ophthalmologist as the disc, is the cable carrying visual information into the brain where it ends up in the occipital lobe and interpreted as vision. It contains over 1.2 million fibers as well as supporting elements. A truly amazing nerve. ...Read moreSee 3 more doctor answers