REFRACTIVE ERROR

WHAT IS REFRACTIVE ERROR?

Refractive error is a physiological condition where the refracting system of the eye fails to focus objects sharply on the retina. Meaning, the shape of your eye does not bend light correctly, resulting in a blurred vision.

GLOBAL FACTS

The number of people suffering from refractive errors worldwide range from 800million to 2.3billion. Of these, around 153million cases have not been corrected with contact lenses or glasses.

WHAT ARE THE SYMPTOMS OF REFRACTIVE ERRORS?

1. Blurred vision

2. Difficulty in reading small prints

3. Headache

4. Eye strain

5. Cross of the eyes in  children (esotropia)

TYPES OF REFRACTIVE ERRORS

MYOPIA (close objects are clear, and distance objects are blurred): Also known as near sightedness, myopia is usually inherited and often discovered in childhood. Myopia often progress through the teenage years when the body is growing rapidly.


HYPEROPIA (close objects are more blurry than distant object): Also known as  far sightedness, hyperopia can be inherited. Children often have hyperpia which may lessen in adulthood.

ASTIGMATISM

Usually occurs when the front surface of the eye, the cornea has an asymmetric curvature. The front surface of the cornea is curved more in one direction than in another. The abnormality may result in vision that is much like looking into a distorted, wavy mirror. Astigmatism causes blurred vision at all distances.

PRESBYOPIA (aging of the lens in the eye)

This is not error of refraction but “accommodation difficulty” associated with aging. As from 40years of age, the lens of the eye becomes more rigid and does not flex easily. The eye loses its focusing ability and it becomes difficult to read at close range.

HOW IS REFRACTIVE ERROR DIAGNOSED?

A refractive error can be diagnosed by an eye care professional during a routine eye examination. Testing usually consists of asking the patient to read a vision chart while testing an assortment of lenses to maximize patient’s vision. Special imaging or other testing is rarely necessary.

HOW IS REFRACTIVE ERROR TREATED?

Refractive errors are treated with corrective lenses such as eye glasses or contact and refractive surgery.

QUESTIONS FREQUENTLY ASKED ABOUT WEARING OF SPECTACLES: WHO SHOULD WEAR SPECTACLES?

Any person, whose eye condition warrants it

WHAT MEDICATION CAN ONE USE TO AVOID WEARING OF SPECTACLES?

No medicine acts like a lens. Other options for the correction of refractive errors include contact lenses, refractive operation on the cornea and laser shaping of the cornea.

I DON’T WANT TO WEAR SPECTACLE, WHAT OTHER OPTION ARE AVAILABLE TO ME?

Options available include contact lenses and laser treatment of the cornea.

IF SPECTACLES ARE RECOMMENDED FOR ME, BUT I DO NOT WISH TO USE IT CAN I SUFFER ANY DISABILITIES?

Yes, the symptoms of the refractive error will continue. For children who are less than 6years they might suffer severe and permanent defective vision as a result of amblyopia which is the inability of the brain to affect the necessary sight neural connection.