Similar to our fingerprints, each of our eyes is dissimilar and has its own exceptional shape and visual individuality. Having poor eyesight is a barrier that creates unnecessary  challenges and sets pointless limits on what you can do in your every day life.
The three factors that create poor eyesight are:

1. The curvature of the cornea
2. The length of eyeball.
3. The light that enters your eyes cannot focus at the proper place.

  
There are three ways to help out persons who go through from unclear vision or poor eyesight

Spectacles -
For centuries, mankind has well-known how to use eyeglasses to transfer the rays of light to their proper points. It is a not dangerous and accepted technique of correcting ones vision, but there can be limits, such as when playing sports, occupational hazards or limits and even self-consciousness that the eyeglass wearer might feel.

Refractive Surgery -
Researchers have developed Radial Keratectomy and PRK (Photorefractive Keratectomy) and LASIK (Laser In-situ Keratomileusis). For LASIK, this is the great revolution in ophthalmology innovation.
 As all things have the side effects, restrictions and complications of Refractive surgery. A balanced opinion of the advantages of Refractive surgery with the identified and unidentified risks. It is significant to recognize that it is not possible to perform any form of surgery without the patient accepting a definite amount of risk and responsibility.

Contact Lenses -
When Contact lenses were developed, public were given an additional technique to improve their vision. One benefit that contact lenses recommend over eye glasses is a wider field of vision, but the daily, required rituals of cleaning the lenses, inserting them into the eyes and taking them out and re-cleaning them another time at night causes some people to shy away from converting to contacts. In addition, if the lens are not taken proper care of and cleaned regularly, there is a risk of infection. For some people with high astigmatism, contact lenses just do not work.

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