Since astigmatism causes two different focuses per eye, and especially if astigmatism exists in both eyes, the brain has much to contend with. As a result, uncorrected or incorrect prescriptions for astigmatism cause blurred and distorted vision, as well as, annoying symptoms of eyestrain such as headaches, eye fatigue, sensitivity to light, loss of visual achievement and poor visual concentration.
It is expected that first correction or large changes in correction of astigmatism may cause objects or straight lines to appear tilted or distorted. This perception of distortion will decrease steadily with time. As with most prescriptions, it is common for the degree of astigmatism to change naturally over time. Eyeglasses, and/or, special astigmatic (toric) contact lenses are available to correct astigmatism.
HYPEROPIA or FARSIGHTEDNESS
The medical term for farsightedness is hyperopia. As with most refractive errors,
farsightedness is commonly caused by the shape of the eye. Farsighted eyes are generally
shorter from front to back or because the front curvature of the eye is flatter than
normal. An uncorrected farsighted eye must use the near focusing system of the eye,
normally only used for close-
Clarity and comfort of vision for the farsighted person depends on their degree of
farsightedness and the efficiency of their focusing system. In general, farsighted
eyes always see better at far distance than at closer distances. Farsighted adults
gradually see less clearly at all distances due to a natural and expected decline
in the eyes close-
Farsightedness is most commonly corrected with eyeglasses or contact lenses. If adults
require different prescriptions for distance and near, special dual-
MYOPIA or Nearsightedness
The medical term for nearsightedness is myopia. When you are nearsighted, your distance vision is blurred. Close range vision is generally clear at some near distance without correction, thus the term "nearsighted." As with most refractive errors, nearsightedness is simply caused by the shape of the eye. In this case, the eye is longer front to back, or has a steeper curve to the front lens of the eye, the cornea. Genetic, environmental or functional factors can also play a role in the development of nearsightedness.
Nearsightedness is generally corrected with eyeglasses or contact lenses. For adults, refractive surgery such as LASIK, or lens replacements are additional options.
Presbyopia is a normal decline in close-
Most people falsely think that muscles inside the eye weaken over time causing this
gradual loss of close-
Serving clients in Northwest Metro Minnesota including the communities of Albertville • St. Michael • Otsego • Hannover • Wright County
Albertville Eye Care, 2011