What are refractive problems?
Light is focused, or refracted, by the cornea, the clear front “window” of the eye. Your vision is clear if the cornea and lens combine to focus an image precisely on the retina. The retina is the inner layer of the eye that senses light and helps you to see. Your vision is blurred if the cornea, lens and eye length place the image in front of the retina. This is known as myopia, or nearsightedness. If the cornea is not round (like a basketball), but instead has unequal curves (like a football), the image is distorted. This is called astigmatism. An eye with astigmatism may have myopia as well. Refractive solutions: Refractive problems such as myopia and astigmatism are solved by helping the eye to focus light using glasses, contacts or refractive surgery. Refractive surgery techniques aim to change the eye’s focus by changing the shape of the cornea. The surgeon sculpts the cornea into a new shape by removing tissue using a laser without (Photorefractive Keratectomy (PRK) – and LASEK)
