Automated Refractometer for Refractive Errors

Four common refractive errors are

• Myopia, or nearsightedness - clear vision close up but blurry in the distance
• Hyperopia, or farsightedness - clear vision in the distance but blurry close up
• Presbyopia - inability to focus close up as a result of aging
• Astigmatism - focus problems caused by the cornea

Glasses or contact lenses can usually correct refractive errors. Laser eye surgery may also be a possibility.

Digital refractometers use the total reflection technology and Peltier temperature control to perform these measurements with highest precision and shortest measuring time.

What are the treatment options for Refractive errors?

Temporary Options:

Spectacles

This is the most common temporary solution to correct refractive errors because of easy maintenance and low cost.

The drawbacks of spectacles are obvious-they interfere with activities and change a person's appearance. Additionally, spectacles also reduce the peripheral vision.

Contact lenses

Contact lenses are a popular alternative to spectacles. They provide excellent peripheral vision and permit a wider range of activities than spectacles.

Contact lenses do not alter a person's appearance. Problems with contact lenses include their recurrent costs, maintenance hassles and possibility of infection and intolerance due to sensitivities.

Permanent options:

There are various surgical options available for the permanent correction of these refractive errors. Your physician must choose the best treatment for your specific disorder.

Eligibility of the candidate for a permanent treatment

Should be above 18 years and should have a stable spectacle power for over a year.

Should not be suffering from other eye disorders like cataract, glaucoma, retinal disorders etc

Should stop wearing soft contact lenses for 1 week & semisoft contact lenses for at least 2 weeks prior to the procedure or measurements.

LASIK (Laser In Situ Keratomilieusis)

In Lasik, the corneal surface is reshaped using a laser beam. It corrects vision by altering refractive power of the eye by a calculated change in the corneal curvature. The image of the outside world is now focused sharply on the retina.

Wavefront Lasik or Customized Lasik

Wavefront Lasik or Customized Lasik is the result of a quantum leap in technology of sight restoration and enhancement. This Wavefront guided Lasik is a giant step forward from conventional Lasik. Optical aberrations (imperfections) inherent in the eye may adversely affect the visual acuity and the optical performance of the eye. Conventional Lasik can only correct the spectacle power & not these subtle optical aberrations. With Wavefront guided Lasik, it is now possible to reduce these aberrations and enhance vision much above the normal levels. Custom Vue (VISx star S4 from AMO) is the procedure available for customized Lasik.