What is -4 eyesight?

-4 eyesight, also known as a refractive error or myopia, is a common vision condition where a person can see objects close to them clearly, but objects that are far away appear blurry.

• The term -4 refers to the measurement of the refractive error in diopters. -4 diopters indicate a moderate to severe myopia.
• Myopia occurs when the eyeball is slightly longer than normal, causing light rays to focus in front of the retina instead of directly on it, resulting in blurry distant vision.
• People with -4 eyesight may have difficulty seeing road signs, the blackboard in a classroom, or recognizing faces from a distance.
• Myopia can be hereditary, meaning it may run in families. It typically starts during childhood or teenage years and can continue to worsen until the early 20s.
• Symptoms of -4 eyesight may include squinting, frequent headaches, eyestrain, and fatigue.
• Corrective measures for -4 eyesight commonly involve prescription glasses or contact lenses. These help to compensate for the refractive error and bring objects into clear focus.
• In some cases, individuals with -4 eyesight may also be suitable candidates for refractive surgery, such as LASIK or PRK, which can permanently reshape the cornea to correct the myopia.
• It is important for individuals with -4 eyesight to have regular eye examinations to monitor the progression of the condition and ensure optimal eye health.