|
KERATOCONUS Lenses for
IRREGULAR CORNEA
Keratoconus is a degenerative disease of the cornea that causes it to gradually thin and
bulge into a cone-like shape. As the disease progresses, the cone become more pronounced, causing vision to
become blurred and distorted. Because of the cornea's irregular shape, patients with keratoconus are usually
highly Myopic and have a high degree of astigmatism that is not correctable with glasses.
Keratoconus is sometimes an inherited problem that usually occurs
in both eyes.
Symptoms
- Nearsightedness
- Astigmatism
- Blurred vision - even when wearing glasses and contact lenses
- Glare at night
- Light sensitivity
- Frequent prescription changes in glasses and contact lenses
- Eye rubbing
|
Detection and Diagnosis
Keratoconus is usually diagnosed when patients reach their 20's.For some, it may advance
over several decades, for others, the progression may reach a certain point and stop.
Keratoconus is not usually visible to the naked eye until the later stages of the disease.
In severe cases, the cone shape is visible to an observer when the patient looks down while the upper lid is
lifted. When looking down, the lower lid is no longer shaped like an arc, but bows outward around the pointed
cornea. This is called Munson's sign.
Special corneal testing called topography provides the doctor with detail about the cornea's
shape and is used to detect and monitor the progression of the disease. A pachymeter may also be used to measure
the thickness of the cornea.
Treatment
- Glasses for very early Keratoconus
- Soft Toric Lenses
- Special Design RGP Lenses
- Hybrid Lenses
- Piggy back Lenses
- Rose K Lenses
- Intra Corneal Intacts
- C3RT
The Rose K is a unique keratoconus lens design with complex computer-generated peripheral
curves based on data collected by Dr Paul Rose of Hamilton, New Zealand. The system incorporates a triple
peripheral curve system
|
