An ophthalmologist is a medical doctor who specializes in the eye, detecting and treating eye diseases with medications and surgery. An optometrist examines & detects vision problems and prescribes glasses. An optician interprets the optometrist's prescription and dispenses eyeglasses or contact lens. An optician is to an optometrist, as a pharmacist is to a doctor.
A visual defect caused by an eye surface that is irregularly shaped. People with astigmatism see less clearly at any distance. It is corrected by the help of cylindrical lens.
It is also known as near-sightedness. The image of the objects we see is formed ahead of the retina instead of over it . It is corrected by the help of concave (minus) glasses.
It is also called farsightedness. The image of objects we see is formed behind the retina instead of over it. It is corrected by the help of convex (plus) glasses.
There is difficulty in reading and near work. It occurs in people over 40 years of age. It is due to age related weakness of the eye muscles which are used to focus on near objects. It is corrected with the help of convex (plus) glasses.
You can train your eye muscles to work better together and correct problems like strabismus (crossed eyes) which involves training the muscles that align the eye. Accommodative exercises may also help children who have strain while reading and writing.
Yes ! "snow blindness" and a welder's flash are examples of "sun burned" eyes. Outdoor enthusiasts and those with sensitive eyes should invest in sunglasses with an ultraviolet filter to block harmful UV radiation from the sun. Contact Lens wearers are especially sensitive to bright light, they should always wear a good pair of non-prescription sunglasses with their contacts when they are outside.