Keratoconus is an eye disease involving the cornea. “Kerato” refers to the cornea and “conus” refers to the conical shape of the cornea. As the name suggests, the disease causes progressive thinning of the cornea causing it to lose its normally spherical shape and bulge forward to take on a conical shape. As a result, light rays fall out of focus, thus causing blurred vision.
An eye examination at this stage typically shows an increase in short-sightedness and astigmatism. The onset of keratoconus is usually in the teens to early twenties. It typically affects both eyes, although one eye may be affected more than the other.
| Disease Stage | Primary Clinical Objective | Recommended Treatment | Visual Outcome & Progression |
|---|---|---|---|
| Early Stage | Correct minor refractive error | Spectacles or Soft Toric Contact Lenses | Restores clear vision; does not stop disease progression |
| Progressive (All Stages) | Halt disease progression permanently | Corneal Collagen Cross-Linking (CXL / C3R) | Strengthens corneal collagen bonds with Riboflavin (Vitamin B2) & UV light; >95% success in halting bulge |
| Moderate Stage | Mask corneal irregularity & smooth focus | Rigid Gas Permeable (RGP) or Scleral Contact Lenses | Scleral lenses vault over the delicate cone, creating a smooth liquid reservoir for superior visual clarity |
| Advanced Stage | Reshape corneal curvature | Intacs (Intracorneal Ring Segments) | Flatten the corneal cone to improve lens fit and functional vision |
| Severe / Scarred Stage | Replace opaque or severely thinned tissue | Corneal Transplant (DALK partial or PKP full-thickness) | Replaces damaged tissue with a clear donor cornea; reserved for advanced scarring or hydrops |
Keratoconus is a bilateral, non-inflammatory eye disease causing progressive corneal thinning and steepening. Early signs include rapidly worsening astigmatism, frequent prescription changes, double vision (monocular polyopia), and extreme glare or halos around lights at night.
Keratoconus is diagnosed using computerized Corneal Topography and Tomography (such as Pentacam imaging). These non-contact scans map the precise front and back curvature and thickness of the cornea, detecting early structural changes before they are visible during a standard routine eye exam.
OasisEye Specialists provides dedicated corneal eye care services across Malaysia. Our fellowship-trained cornea specialists diagnose and manage keratoconus, corneal ectasia, irregular astigmatism, corneal dystrophies, corneal ulcers, and ocular surface disorders. Treatment and management options include corneal collagen cross-linking (CXL), specialty contact lens fittings, and corneal transplants (keratoplasty). Services are available at our Kuala Lumpur, Penang, and Johor Bahru centres through Dr Vanitha Ratnalingam, Dr K John Mathen, and Dr Gayathri Govindasamy.
Corneal Collagen Cross-Linking (CXL) applies Riboflavin (Vitamin B2) drops activated by ultraviolet A (UVA) light. This chemical reaction creates new covalent bonds between corneal collagen fibers, stiffening the cornea and halting further cone protrusion.
While the exact cause is unknown, Keratoconus is linked to genetic factors, chronic eye rubbing, vigorous allergies, and connective tissue disorders. Chronic eye rubbing is one of the most significant preventable risk factors.
Keratoconus rarely causes total blindness because it does not damage the optic nerve or retina. However, left untreated, it can cause severe visual impairment due to corneal scarring or hydrops (corneal swelling).
The procedure itself is completely painless as numbing eye drops are applied. Patients may experience mild to moderate discomfort, light sensitivity, and tearing for 2 to 3 days post-procedure while the outer epithelial layer heals.
CXL is designed to stop progression, not cure or restore lost vision. However, once the cornea is stabilized with CXL, vision can be safely optimized using specialty contact lenses or Intacs.
Standard soft lenses conform to the cone-shaped cornea, preserving visual distortion. Scleral lenses vault entirely over the irregular cornea, resting on the white sclera and filling the space with fluid to create a smooth, perfect optical surface.
Keratoconus typically begins in the teens or early twenties and progresses actively through the 20s and 30s. The condition usually stabilizes naturally by age 40 as corneal collagen naturally stiffens with age.
No. With early detection and timely Corneal Cross-Linking (CXL), less than 10% of keratoconus patients require a corneal transplant today.
Initial surface healing takes 3 to 5 days. Vision may fluctuate temporarily, but most patients return to normal work or school routines within one week, with full optical stability reached in 1 to 3 months.
At OasisEye Specialists, Corneal Cross-Linking (CXL) per eye ranges from RM4,000 to RM7,500. International patients are subjected to an additional 6% SST.
No. LASIK is strictly contraindicated for Keratoconus patients because removing corneal tissue further weakens an already thin cornea, worsening the condition.
