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VISION PROBLEMS
Do you wear contacts or glasses? If not, you probably know someone who does. Many people need contacts or glasses because they are nearsighted. Things faraway look blurry. Light rays focus in front of the retina because the eyeball is too longsome people have the opposite problem. They are farsighted and can’t see close-up things very well. In farsightedness, light rays focus behind the retina because the eyeball is too short. Astigmatism is another vision problem. A person has an astigmatism when their cornea is unevenly curved. Older people sometimes need reading glasses because the muscles in their eyes can no longer focus on things that are nearby.
مشاكل في الرؤية
هل ترتدي العدسات اللاصقة أو النظارات؟ إذا لم يكن الأمر كذلك ، فمن المحتمل أنك تعرف شخصًا يعرف ذلك. يحتاج الكثير من الناس إلى عدسات لاصقة أو نظارات لأنهم يعانون من قصر النظر. تبدو الأشياء البعيدة ضبابية. تتركز أشعة الضوء أمام شبكية العين لأن مقلة العين طويلة جدًا. بعض الناس لديهم مشكلة معاكسة. إنهم بعيد النظر ولا يمكنهم رؤية الأشياء عن قرب جيدًا. في طول النظر ، تتركز أشعة الضوء خلف شبكية العين لأن مقلة العين قصيرة جدًا. اللابؤرية هي مشكلة أخرى في الرؤية. يعاني الشخص من اللابؤرية عندما تكون القرنية منحنية بشكل غير متساوٍ. يحتاج كبار السن أحيانًا إلى نظارات قراءة لأن العضلات في أعينهم لم تعد قادرة على التركيز على الأشياء القريبة
EYE DISEASES
Diseases strike different parts of the eye. A sty is an infection of the eyelid. Conjunctivitis, or pinkeye, is an infection of the thin layers covering the eyelid and outer eyeball. Many eye diseases are most common in older people. Sometimes the lens of the eye gets cloudy over time. This condition is called cataracts. Retinas can get detached (come loose) from the back of the eye and cause blindness. Glaucoma occurs when fluid gets trapped between the cornea and the lens and puts pressure on the eye. A problem called macular degeneration affects the center of the retina. It can cause blindness in older people. There are many treatments for eye diseases. Doctors treat infections with drugs. They use laser beams to weld detached retinas back into place. Surgeons can replace clouded lenses with clear plastic ones. They can also replace diseased corneas. It is very important to protect your eyes. Get regular eye examinations. Wear eye protectors when doing dangerous work or playing rough sports. Wear sunglasses that protect against harmful rays from the Sun. Your eyes are too important to take chances with!
