Short-sightedness (myopia) is typically diagnosed when you’re in your teenage years. The condition occurs because of a combination of genetic factors and excessive eye growth.
Experts believe that the rapidly rising rates of short-sightedness are related to extreme close up focusing (such as excessive reading and use of mobile screens) during the early teenage years. Lack of exposure to sunlight and outdoor conditions is also believed to cause this condition.
Long-sighted patients do not have the focusing power, or the eye is not strong enough to bring things into focus – this results in blurred vision.
The additional strain put on the eye to try and focus can cause eyestrain, squinting, and headaches.
This excessive strain can become even more problematic for long-sighted patients from age 40 onwards when the onset of presbyopia begins.
Long-sighted patients typically have shorter than average eyes. This can be due to a combination of genetic factors.
Astigmatism is where the cornea and/or lens of the eye, rather than being completely round-shaped, is actually slightly oval-shaped and elongated.
Just like many of us who have slightly asymmetrical faces and other bodily features, the cornea and lens can also have irregularities. In the case of eyes, these differences in symmetry and shape result in visual distortion.
Presbyopia is an eye condition which causes people aged 45 and older to need reading glasses. The eye’s natural lens stiffens as we age, and this causes you to lose the ability to focus close up gradually.