Myopia: Near Sightedness

With myopia, objects that are further away appear blurrier than things that are closer to your eyes.  This is most often caused by the lengthening of the eyeball, however an increase in the curvature of the front surface of the eye (the cornea) can have the same effect.

Because the eye is excessively long light comes to a focus before it hits the retina, causing a blurred image.  To correct for this “error” concave lenses are prescribed that change where the light is focused, to focus precisely on the retina.

Blurry distance vision is the most common symptom.  Squinting often temporarily reduces the amount of blur.  Men and women are equally affected, and myopia often progresses rapidly through the growth stages of human development (elementary and teenage years).

There is strong, inheritable genetic component which is now thought to be made worse by environmental stressors such as prolonged or excessive near-work.  Myopia runs in families, more than 30% of the US population is to some degree myopic.  In some Asian countries as much as 80-90% of the population is myopic!  High levels of myopia can cause many degenerative eye conditions including glaucoma, cataracts, and retinal detachments.

Exciting new research is highlighting the many factors that contribute to myopia development, as well as shedding light on therapies that may halt or slow the progression of near-sightedness.  At Rising Star Optometry, we have begun to use specially-designed contact lenses, called Ortho-Keratology lenses, that in preliminary studies have shown reduction in the progression of myopia in children by up to 50%.

 

Related Services

  • Visual Efficiency Exam
  • Dilated Health Exam
  • Corneal Reshaping (Ortho-Keratology)
  • Soft Contact Lenses
  • Specialty Contact Lenses
  • Sports Vision

 

Resources

  • All About Myopia – COVD
  • How Stuff Works Guide to Refractive Errors
  • National Eye Institute Definitions