The correct answer is: A Clouding of the lens in the eye that affects vision
Explanation:
A cataract is a clouding of the lens in the eye that affects vision. Cataracts are the most common cause of vision loss in people over age 40 and the principal cause of blindness in the world.
The correct answer is: D All of the above
The lens of the eye helps us focus and see things clearly. It is made up of mostly water and protein. As we age, this protein may clump together and cloud the lens, forming a cataract. The cataract may grow over time, making vision more difficult. The aging process is the most common cause of this protein buildup that leads to cataracts. Other causes of cataracts include diabetes, trauma to the eye, certain medications (corticosteroids and phenothiazines), unprotected ultraviolet (UV) exposure, and eye surgery. In rare cases, cataracts may be present at birth or shortly thereafter.
The correct answer is: C Cloudy or blurry vision
The correct answer is: • True
Prolonged exposure to the ultraviolet (UV) rays of sunlight is a risk factor for cataracts. Long-term exposure to this type of radiation can cause changes in the lens that can lead to development of cataracts. The good news is that wearing sunglasses regularly can help protect your eyes from the damage of UV rays and may help prevent cataracts from developing or getting worse.
If not treated, cataracts can lead to blindness. Cataract-related blindness is less prevalent in developed countries, but the World Health Organization estimates 51% of world blindness is due to cataracts.
Auto Next Question:ON OFF
NO. 1 ،،Alley Shateri،Lower Jomhuri Street Alley Saleh , Hafez Street , Tehran ,Iran tell : +982166704814 fax : +982166716431 email : Info@shahredaru.com
copyright 2016 shahredaru Co ©