WHAT IS CATARACT?
Cataract is the crystalline lens opacification accompanied by the vision acuity changing up to its full loss.
A human’s vision becomes unclear and blurry. The crystalline lens becomes opaque due to changing of the metabolic processes in the fluid feeding the crystalline lens.
Blurred vision, spots, floaters are the cataract symptoms at the disease early stage.
Then the vision worsens at twilight or in the bright light.
The symptom of the cataract development is disappearance of the need in eyeglasses while reading as the near vision improves without eyeglasses correction.
As the cataract progresses a human has to change the eyeglasses often. When the cataract is almost mature or just mature, the vision acuity worsens evidently up to its full loss.
WHO CAN SUFFER FROM CATARACT?
Mostly elderly persons suffer from cataract (the so cold age-dependent cataract). Besides the age-dependent cataract, congenital, traumatic, complicated cataracts are known. They can develop in the childhood, young and elderly age.
WHEN DO COMPLICATED CATARACTS DEVELOP?
Complicated cataracts develop secondary to some other diseases:
- Diabetes mellitus;
- Rheumatoid arthritis;
- Oncologic diseases;
- Radiation exposures;
Complicated cataracts can develop in case of the vision organ various pathologies:
- Retinal dystrophy;
- High myopia;
- Inflammatory diseases of eye membranes.