The term hardware refers to the physical components that make up a computer. These components may be mechanical, electrical, electronic or magnetic. The term may also be used to....
Causes and symptoms. The early symptoms of trachoma include the development of follicles (small sacs) on the conjunctivae of the upper eyelids; pain ; swollen eyelids; discharge; tearing; and sensitivity to light.
vitamin A deficiency, measles, neonatal conjunctivitis, and. harmful traditional eye treatments. About 8 million people. are visually impaired as a result of trachoma, making it the. leading infectious cause of preventable blindness.