Understanding Your Eye
The primary function of the optical system of your eye is to focus light. You need glasses and contacts when your eye cannot focus the light properly. Your eye works like a camera. The cornea, at the front of your eye, provides most of the focusing power. The lens, inside your eye, provides the fine tuning and reading ability. The retina, at the back of your eye, acts like the film in a camera. For you to see clearly, light rays must focus precisely on the retina.
Myopia (near objects are clearer than distance objects) occurs when your eye is too long in relation to the curvature of your cornea. Light rays entering the eye come to a focus in front of the retina, producing blurred image.
Eyeglasses and contact lenses are common methods of correcting nearsightedness. Eyewear may be used for certain activities, like watching television or driving, or for all activities. Alternately, refractive procedures such as Lasik and Clear Lens Exchange may rectify the problem.
Hyperopia (distant objects are clearer than near objects) occurs when your eye is too short in relation to the curvature of your cornea. Light rays entering the eye come to a focus behind the retina, producing a blurred image.
Eye glasses and contact lenses can correct farsightedness. Some farsighted people are good candidates for refractive surgery: Lasik or Clear Lens Exchange.
Astigmatism is blurring of vision caused by an irregular curvature of the surface of the eye (the cornea). Most people who are near or far sighted have some degree of astigmatism.
Glasses and contacts correct astigmatism, as well as the refractive procedures Lasik, and to some extent Clear Lens Exchange when combined with LRI.
Presbyopia is an inability to focus on near objects. However, presbyopia is not caused by an oblong eye shape or improperly curved cornea; instead, the loss of focus occurs because the crystalline lens of the eye loses its flexibility. It is a part of the eye’s natural aging process, not a disease, and it cannot be prevented.
Presbyopia usually appears in the early to mid-40s and may seem to occur suddenly, but in actuality it takes many years for the lens to stiffen. Symptoms include eye fatigue and headaches when focusing on nearby objects, blurred vision at normal reading distance, and holding reading materials at arm’s length to focus. Presbyopia can occur along with other vision conditions such as nearsightedness, farsightedness and astigmatism.
The simplest corrective measures for presbyopia are glasses, bifocals, trifocals and contact lenses. Since presbyopia is a progressive condition, eyewear prescriptions may need to be checked regularly.
Refractive procedures are available for presbyopia. Individuals who are both nearsighted and presbyopic may have their distance and near vision greatly improved from Lasik, utilizing the concept of Monovision. Some Nearsighted persons who are also presbyopic may benefit from the refractive procedure Clear Lens Exchange utilizing the Monovision concept,or multi-focal lens implants.
Eye Care For Tulsa has brochures, regarding medical conditions, available for your review. Just click on one of the links below to choose the topic of interest for more information:
- AK (Astigmatic Keratotomy)
- Anatomy of the Eye
- Cirugia Cataractus sin puntos/pequena incision - Cataracts-Spanish
- Cataract Symptoms
- Cataracts & No Stitch/Small Incision Surgery
- Diabetic Retinopathy
- Dry Eyes
- Excimer Laser
- Floaters & Flashes
- Foldable Lens Implants
- Laser Skin Resurfacing and Eye Lid Lifts
- Laser Vision Correction
- Macular Degeneration
- Migraine Headaches
- Normal Vision
- Refractive Errors and Vision Correction
- Refractive Errors
- Retinal Detachment
- Retinal Tears
- After RK
- RK/AK How the procedures work
- Vision Correction Surgery
- YAG Laser
- Your Vision