Weak eyesight Clinic

Bad eyesight, or blurred vision, is most commonly caused by a refractive error like nearsightedness (myopia), farsightedness (hyperopia) or astigmatism. Refractive errors develop when the eye is unable to focus light directly on the retina. This inability to focus stems from imperfections in the eye’s length, corneal curvature and/or internal lens curvature. The refractive error you experience depends on which anatomical flaw your eyes have. For example, eye length is normally associated with farsightedness, corneal curvature is linked to astigmatism and lens curvature can determine nearsightedness or farsightedness. Amblyopia (lazy eye) — caused by a lack of communication between the eyes and the brain — is another condition that can cause poor eyesight. The brain is supposed to receive visual signals from both eyes, but in young patients with amblyopia, the brain ignores signals from one of the eyes.