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Astigmatism blurs vision at all distances because the optical parts of the eye (cornea & lens) do not focus light onto the retina clearly due to their irregular shape. As for example a rugby ball shape. Toric lenses (spectacles or contact lenses) are used to help focus the light to eliminate blurriness from astigmatism.
Cataract is a clouding of all or part of the normally clear lens within your eye, which results in blurred vision. Cataracts are most often found in persons older than 55 years of age, but they are also occasionally found in younger people.
Farsightedness, also known as hyperopia is when the eyeball is too short for the normal focusing power of the eye. Depending on severity, it can cause blurred vision and eye fatigue, especially when doing close work.
Glaucoma is an eye disease in which the internal pressure in your eyes increase enough to damage the nerve fibres in your optic nerve and cause vision loss.
Keratoconus is a vision disorder that occurs when the normally round cornea (the front part of the eye) becomes thin & irregular (cone) shaped. This abnormal shape prevents the light entering the eye from being focused correctly on the retina and causes distortion of vision.
Macula Degeneration often referred to as AMD or ARMD is a relatively common problem for people as they age. The macula is a part of the retina. A healthy macula is necessary for centralized vision and focus necessary to effectively read or drive. When the macula begins to deteriorate, central vision loss can occur. An Amsler Grid test can identify changes in your macula early. Test yourself - an Amsler Grid is in the next tab.
Nearsightedness also known as Myopia causes distance objects to appear blurred and close objects are seen clearly. The eyeball is too long for the normal focusing power of the eye.
Presbyopia is an age related vision condition in which there is a gradual loss of the eye's ability to focus on near objects. It normally starts at age of 40. This condition can be corrected with reading glasses.
Pterygium is an abnormal growth of tissue on the conjunctiva, the clear membrane the covers the white of the eye, and the adjacent cornea, the clear front surface of the eye. UV light is one of the main cause of pterygiums.
