Ophthalmology involves the diagnosis and treatment of refractive, medical and surgical problems related to eye diseases and disorders. A range of anterior (front of the eye) procedures are performed at Hibiscus Private Hospital using up-to-date technology and HPH is the only hospital on the South Coast to offer posterior eye surgery.
More specifically known as posterior vitrectomy, or surgery to the back of the eye, this procedure is especially suited to treating damage to the retina caused by diabetes, retinal detachment or haemorrhage in the back of the eye. The operation is accomplished with a high-power microscope and tiny two-millimetre incisions.
Also known as myopia, nearsightedness occurs when an object that is near appears clear, but an object that is far appears blurred. Light entering the eye will focus in front of the retina (in a normal eye, the light will focus directly on it):
- Blurred distance vision
- Squinting eyes seems to clear vision
Corrective concave lenses can be used to correct the refractive error and assist in focusing the image on the retina. In some cases, laser cornea surgery is used to correct the problem.
Also known as hyperopia, farsightedness occurs when far objects appear clear, but near objects appear blurred. The light that enters the eye will focus behind the retina (in a normal eye, the light will focus directly on it):
- Difficulty seeing up close
- Difficulty reading
- Blurred vision
- Eye fatigue
Corrective convex lenses are prescribed to compensate for the refractive error. In some cases, laser surgery is available for those who wish to see without glasses.
When the cornea is oval shaped, instead of spherical, it is known as astigmatism. This causes distorted vision.
The irregular shape prevents light from focusing properly on the retina, the back part of the eye. As a result, vision is blurred at all distances. Those afflicted with myopia or hyperopia may develop astigmatism.
Astigmatisms are quite common. Experts believe that all people have a degree of astigmatism. Often, it is congenital and may remain present without becoming problematic throughout life. It is also believed that heredity plays a role in developing astigmatism.
- Distorted vision
- Blurred images
If the astigmatism is mild and no other problems of refraction, such as nearsightedness or farsightedness, are present, it may not be necessary to use corrective lenses. Toric lenses are used when astigmatism is present. These lenses are unique in that they have a cylinder that that add additional power to the lens. More light-bending power is available in one axis. In some cases refractive surgery is used to correct some forms of astigmatism that are of low degree.