Dry eye is a common eye problem that mainly affect people age 50 and older. The majority of people with dry eyes are women, but men also have this problem. Dry eyes are caused bu a lack of insufficient tears in the eyes. Human tears can prevent eye problems and infection. Combined with water, fatty oils and mucus, human tears are essential in protecting eyes from irritation and dryness.
There are many reasons for dry eyes. For some people, the cause of dry eye is their eyes produce too less tears. For other people, the cause is that their tear evaporation has increased, and there is an imbalance in the makeup of your tears.
Decreased tear production
When your eyes fail to produce enough tears, dry eye syndrome occurs. There are many causes of decreased tear production. The causes includes aging, certain medical conditions, laser eye surgery and so on. As we all know that our bodies began to produce fewer tears as we grow old. And age is the most common cause of dry eye syndrome. Decreased eye production can make your eyes feel itchy, dry and look bloodshot. Usually you can use eye drops to add more moisture on the surface of your eyes. In reality, we use eye drops to help us get relief from our irritated eyes. We can also change and adjust environmental elements to ease dry eye symptoms. We can turn off the ceiling fans and run a humidifier to deal with the situation of tear shortage. Among people with LASIK vision correction surgery, dry eye is common in them. In reality, most people with LASIL surgery have some degree of dry eye syndrome.
Increased tear evaporation
Wind, smoke or dry air can make your eyes dry and cause increased tear evaporation. Also, blinking less often can also cause increased tear evaporation. This is often when you are concentrating, when you are reading books, driving or working in front of a computer. Eyelid problems, for example when you have out-turning of lids and in-turning of the lids.
Abnormal Tear Composition
Dry Eyes can also be caused by abnormal tear composition resulting in rapid evaporation or premature destruction of the tears. When caused by rapid evaporation, it is termed evaporative dry eyes. When caused by rapid evaporation, it is known as evaporative dry eyes. In this condition, although the tear gland produces a sufficient amount of tears, the rate of evaporation of the tears is too fast. There is a loss of water from the tears that results in the tears that are too hypertonic. In other words, the watery portion of the tears evaporates, leaving small amounts of very salty (hypertonic) liquid behind. As a result, the eye cannot keep the conjunctiva and cornea entirely covered with a complete layer of tears, particularly during certain activities and in certain environments.