EYE's

Like the rest of your body, your eyes are a delicate system that require regular checkups and care. There are a variety of illnesses that can affect your vision. It is important that you have a regularly-scheduled comprehensive exam to maintain healthy eyes and to prevent and treat eye disease.
Myopia or near-sightness means that either the eye is too long or the optics are too strong. In either case the light from a distance object focuses in front of the retina. Minus or concave lenses are used to move the image back on the retina when viewing distance objects.
The vision may be corrected with glasses, contact lenses or refractive surgery. Clearly if your parents are nearsighted you have a better chance of becoming nearsighted. Identical twins have similar refractive errors.
Myopia is much more common in people with a higher education. There are those who claim that since people with myopia can’t see clearly at a distance, they become more interested in things up close where they can see clearly, e.g. reading, computers.
The fallacy of this argument is that once myopic patients are corrected with glasses or contact lenses, distance vision is clear. Most myopia develops during periods of accelerated growth (8-19). Previously myopia stopped by the early twenties. Today, we see more myopia progressing in the late twenties or thirties in those patients who spend a preponderous amount of time reading and computer use.
AstigmatismIf you experience a distortion or blurring of images at all distances — nearby as well as far — you may have astigmatism. Even if your vision is fairly sharp, headache, fatigue, squinting and eye discomfort or irritation may indicate a slight degree of astigmatism.
A thorough eye examination, including tests of near vision, distant vision and vision clarity, can determine if astigmatism is present.
Astigmatism is not a disease nor does it mean that you have “bad eyes.” It simply means that you have a variation or disturbance in the shape of your cornea.
Astigmatism is one of a group of eye conditions known as refractive errors. Refractive errors cause a disturbance in the way that light rays are focused within the eye. Astigmatism often occurs with nearsightedness and farsightedness, conditions also resulting from refractive errors.

Eye care for computer users
It is a visually intensive task and, unfortunately, our work pressure and lifestyles do not give us the opportunity to be kind to our eyes.Which is why these tips should come in handy.
Working on a computer? Beware of RSD
i. Know your eyes
Tears: The first line of defence, they also serve as lubrication by keeping the eyes moist and nourished; they also have a corrective lens function.
Eyelids: Their main job is to protect your eyes from dirt, dust and harsh light.
Eyelashes: A protective net for your eyes.
Cornea: A refractive zone that guides light to reach the retina.
Pupil: Controls the amount of light that enters your eyes.
Lens: A refractive zone that also guides light into the retina.
Retina and Optic Nerve: A bunch of intricate wiring that carries vision signals between your brain and eyes.
ii. Exercise your eyes
Dr C.SHAH, a practising ophthalmologist (eye specialist) based in Mumbai, says that regular work hours should be infused with short breaks. During such breaks, he suggests a small and easy exercise: “First, blink your eyes several times. While you keep your eyes closed, roll your eyeballs both clockwise and anticlockwise and take a deep breath. Gradually open your eyes while releasing your breath. This exercise lasts for a minute and you can repeat it three times before getting back to work.” It serves as a good workout for the eyes.
iii. Look awayWhile working for long hours, look at distant objects either in your office or outside. Looking at a distant object and then returning to your task helps your eyes focus better. Try taking such visual breaks for about five to 10 minutes every hour.
Know your contact lenses“Ideally, a person who uses lenses should wear it for not more than 10-12 hours a day and occasionally for 14 hours a day,” suggests Dr SHAH.Never wear your contact lenses while swimming. The pool water houses various micro-organisms as there are several people using it. This may lead to fungal infections in the eyes. In addition, the chlorine in the water can damage your contact lenses.”Lenses are like sponge, making them susceptible to attracting dirt,” says Dr SHAH