What are dry eyes disease? What are their symptoms, Causes?

Dry eyes

Dry eyes disease is also known as dry eye syndrome.In it, a tear can end too fast or tears in eyes are made slowly. Tear is part of happiness and sadness, in any condition your eyes get full of tears. This disease is common for human and animals, it can affect both or one side eyes.

Dry eyes can occur at any age, but it is more common at an older age. In some case, dry eyes produce so many tears which are known as relaxing tearing. When lack of moisture irritates your eye, it relaxing happened.

What happened when tear do not give moisture to eyes:-

  • Itching
  • Redness
  • Irritation
  • Blurred vision

Dry eyes

What is tear?

Tear is a liquid which produced by tear glands, tears are made eye clear and smooth because of this you can see clearly. Tears are made up of:-

  • Fatty oils
  • Water
  • Protein to make infection free
  • A gel or liquid which contains ions 
  • Some substance which flight arranged bacteria.


  • Difficult to open eyes
  • Blurry vision
  • Mucoid discharge
  • Hyperemia
  • Irritation
  • Excessive tearing
  • Photo phobia
  • Problem in using contact lens
  • Feeling like dryness, sandy, and pain in the eye.
  • Awkwardness to open eyes in wind and sunlight.
  • Tearing
  • Double vision


Dry eyes disease are caused by lack of enough tear, eyes produce tear all the times. A healthy eye is a cover with fluid [liquid] which is known as tear film. Tear glands produce few tear, it can break the tear film.

Main causes of dry eyes disease is:-

  • Aging
  • Imbalance
  • Side Effects of drugs and medicines
  • Eyelid problems and environment problem


Aging is the main cause of dry eyes disease, at age of 40-50, tear glands are insufficient to produced tear. Because of lack of tear eye become easily dry and irritated. It is common in women because of stopped menstruate after this there is harmony change in women’s body.

Common reduction of tear causes:-

  • Treatment by Radiation
  • Lack of vitamin A
  • Antibodies diseases, like syndrome
  • Diabetes
  • Eye surgeries [laser]


Imbalanced in tear mixing is the main cause of dry eyes. The tear film is a mixture of water, oil, and mucus, the problem occurs when these three layers are not mixed properly.

In the top layer, oil comes from edges of the eyelids, this oil can make surface smooths. The oil level can cause evaporation of tear very quickly.

The middle layer, tear gland can produce the thickest layer, it can help to clean eyes from irritation. This water layer is very thin, the mucus layer and oil layer can touch each other. This touching cause the discharge.

The inner layer, mucus has enabled to spread tear over the whole eyes. This can lead patches on the cornea, in the front of the eye.

Eyelids problems and environment problems

Every blink of an eye can spread eyelids to thin tear film of the surface of the eye. Most people blink more than 6 times a minute. Eyelids problem can affect the blinking motion, includes ectropion, in it, eyelids are inward and outwards.

Environment factors are:-

  • Climate
  • Sun
  • Hot dry air and blowing air
  • wind