Near sightedness, also known as short-sightedness or myopia, is an eye disorder where light focuses in front of, instead of on, the retina. This causes distant objects to appear blurry while close objects still appear normal. This happens either when the lens becomes too curved or distance between the lens and the retina becomes longer than usual.

Symptoms of myopia include:

• Blurred vision

• Headaches

• Eye strain

• Squinting of eyes to see clearly

• Excessive blinking

• Rubbing eyes in children

Treatment of myopia:

• Concave lenses are used for myopia. In myopia, light rays focus in front of the retina. Concave lens diverges the light rays, thereby making them focus on the retina.

• Laser-assisted in-situ keratomileusis (LASIK): This involves reshaping of the cornea to correct vision.

• Intraocular lens implant (IOL): In this procedure, lens is implanted to the eye to moderate myopia.

• Photorefractive keratectomy (PRK): Removing the epithelium that later grows to conform to the cornea’s shape.