Glasses and contact lens fitting

Glasses and contact lens fitting

Refractive Errors

• Short-sightedness
  - A vision condition in which near objects can be seen clearly, but things far away cannot be focused.
  - Light entering the eye focuses in front of the retina. This happens in eyes with steeper cornea or longer in length.
  - Patients with high short-sightedness tend to have weak areas, holes or tears in the peripheral retina. These patients should have a regular retina check up to detect and treat these holes or tears early, before they may cause serious Retinal Detachment and loss of vision.
  
  
• Long-sightedness
  - Long-sighted people may have difficulty in seeing far and near objects clearly, especially the near one.
  - Light entering the eye focuses behind the retina. This happens in eyes with flatter cornea or shorter in length.
  
  
• Astigmatism
  - It occurs when the cornea has an irregular curvature. As a result, the light rays entering the eye are focused on more than one point.
  
  
• Presbyopia
  - A vision condition occurring at about the age of 40.
  - The lens inside the eye becomes less elastic and loses its ability to focus on close objects