Farsightedness or Hyperopia is largely an inherited condition caused by inability of the eye to become round enough to cause a clear image. It is also called hypermetropia or long sightedness. Typically crossed eyes, blurred vision of close objects and eye strain are symptoms of hyperopia in children. Objects at distance can be seen clearly while those in near range appear blurred. Refraction test, visual acuity and retinal examination help diagnose farsightedness. Corrective glasses or contact lens help correct this problem. People with hyperopia can experience blurred vision, asthenopia, accommodative dysfunction, binocular dysfunction, amblyopia, and strabismus. Nearby objects may appear blurred. Regular eye tests are recommended for all persons, especially those with high risk of eye diseases like glaucoma or those who have high hereditary factors.
Orthokeratology is a process that reshapes the cornea using hard contact lens so as to correct or reduce refractive problems such as astigmatism, hyperopia and myopia. This is a non-surgical and non-invasive process that involves wearing specific lenses each night so as to achieve ideal corneal shape. This allows the person suffering the vision problem to be free of spectacles or glasses throughout the day. Those with high myopic error have seen some reduction in the error while teenagers how are recently myopic can help stabilize the progression of the vision defect. But the person needs to visit the optometrist many times in a period of about 6 months.
Astigmatism is a refractive error caused by abnormal curvature of the cornea thereby causing blurred vision. It might occur along with myopia or hyperopia. Some persons suffer astigmatism from birth. Astigmatism can be identified with the routine eye tests. Visual acuity test, keratometry and refraction might be undertaken to diagnose the astigmatism or any other vision problem. Mild astigmatism is not usually corrected. Corrective lens is prescribed after noting the extent and axis of the astigmatism. Orthokeratology is undertaken to implant specially designed rigid contact lenses to gradually reshape the curvature of the cornea. Laser surgery can be done to alter the corneal shape.
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Collection of Pages - Last revised Date: September 21, 2018