Cataract is a cloudy area in the lens or lens capsule of the eye. Cataract formation can be viewed very similarly to hardening of the arteries, which we all experience to some extent as we age. The human lens, which becomes a cataract, is really a series of membranes, much like those that line our blood vessels.
A cataract blocks or distorts light entering the eye. This causes problems with glare from lamps or sun. Vision gradually becomes dull and fuzzy, even in daylight. Most of the time, cataracts occur in both the eyes, but only one eye may be affected. If they form in both eyes, one eye can be worse than the other, because each cataract develops at a different rate.
Cataracts account for 42 per cent of all vision losses, making it the leading cause of blindness worldwide and it can be noted that delaying the onset of cataracts by 10 years would eliminate the need for one-half of all cataract surgeries. Although cataract surgery is relatively quick, safe, easy and painless, it does not result in completely normal vision. Clearly, preventing cataracts, if possible, would be preferable. Timira is the Ayurvedic term indicative of various kinds of disturbances of vision.
There are various types of timira according to the involvement of various patalas (layers) and vitiation of doshas. If proper care is not taken in this stage, it leads to cataract or linganaasha. According to Ayurveda, aggravated vaata is responsible for this condition. One of the properties of vaata is to make things dry up. When the unctuousness and softness of the lens and its capsule are lost, it becomes opaque thereby forming cataract.
Causes
1. Senile cataracts are the most common form. These cataracts result from ageing. This is probably due to changes in the chemical state of lens proteins. Although the chances of developing cataracts clearly increase with age, it can be easily stopped.
2. Traumatic cataracts develop after a foreign body enters the lens capsule with enough force to cause specific damage. Some types of eye surgery probably increase cataract risk for similar reason. Laser surgery for narrow angle treatment, known as peripheral iridotomy, and glaucoma surgery, known as trabeculectomy may increase risk of cataract formation. Welders and glass blowers are exposed to high levels to infrared light at close range. Failure to wear adequate eye protection can cause the lining of the lens to peel back and result in cataract formation.
3. Complicated cataracts occur secondary to other diseases (e.g. diabetes mellitus) or other eye disorders (e.g. detached retinas, glaucoma etc.). Inflammation within the eye probably increases cataract risk. Ionizing radiation or infrared rays can also lead to this type of cataract. In addition, a baby can be born with cataract in one or both eyes if its mother had German measles (rubella) when she was pregnant.
4. Toxic cataracts can result from medicinal or chemical toxicity. Steroid medications, such as prednisone, cortisone—either as pills or eye drops definitely increase cataract risk if taken for prolonged periods. This is especially common in association with chronic respiratory condition such as emphysema or asthma, where prolonged steroid use is often necessary for life. Smokers have an increased risk of developing cataracts.
Symptoms
• Painless and gradual blurring of vision
• Glare and light sensitivity that can cause problems when driving
• Frequent eyeglass prescription changes
• Double vision in one eye
• Halos which may appear around lights
• The need for brighter light to read
• Poor night vision
• The appearance of fading or yellowing of colors
• Pupils which are normally black appearing milky white.
Self-Help Guidelines
• Accumulation of free radicals in the lens of the eye may lead to oxidative damage of lens proteins, which can result in the proteins to clump together and form large aggregates that scatter light instead of allowing it to pass through. Exposure to sunlight and oxidants such as cigarette smoke will contribute to free radical formation. Vitamin C, an important antioxidant normally present in high concentrations in the lens, may reduce the risk of cataract because it protects lens proteins against oxidative damage. Eat a lot of food high in vitamin C, which is thought to help prevent or delay cataracts. Carrots, oranges, and aamla are examples of such foods.
• Avoid rancid foods and all other sources of free radicals. Use a lot of turmeric. Eat foodstuffs high in sulphur; foodstuffs containing amino acids (more grains and legumes) and reduce intake of animal fats. Researchers have found that foodstuffs high in vitamin E (vegetable oils, nuts and seeds) will reduce risk of cataracts.
• Limit exposing your eyes to X-rays, microwaves, and infrared radiation. When indoors, make sure your lighting is not too bright or pointed directly at you. Use soft, white light bulbs instead of clear ones, and arrange to have light reflect off walls and ceilings. Avoid over-exposure to sunlight. Use sunglasses that block ultraviolet rays. Wear a wide brimmed hat to keep direct sunlight from your eyes. Wear glasses or goggles that protect your eyes whenever you use strong chemicals, power tools, or other instruments that could result in eye injury.
Ayurvedic Remedies
• Mahaa triphala ghrita is usually prescribed internally in this condition. The main ingredients of this medicine are triphala and cow ghee. Triphala provides nourishment and strengthens the nerves and other tissues of the eyeball whereas ghee is known to balance the aggravated vaata. Moreover, aamla is one of the ingredients in triphala that contains lots of vitamin C. This medicine acts very well in the initial stages of cataract.
• Take a tablespoonful of triphala choorna and add to a tumbler of water in the evening. Cover and keep aside for 12 hours. In the morning, strain it through a piece of clean cloth. Use this filtrate for both washing the eyes and drinking.
• The internal usage of the powders of triphalas, turmeric and yashtimadhu (mulathi), three to six grams in combined form along with honey or ghee, helps a lot to slow down the cataract formation. Chandrodaya varti is the external preparation used in cataract. Over a clean stone, it is rubbed with sterile water and the paste is applied in the form of collyrium. As it has a mild irritating nature, it causes lacrimation in the eyes and promotes blood circulation. This preparation also provides nourishment to the tissues of the eye.
• Alternately, take one litre juice of aamla, thicken it, and add 50 grams ghee and 50 grams honey. Apply it externally.