If your glasses prescription keeps changing every few months, your vision looks smeared or doubled even with new lenses, and your optician mentions “irregular astigmatism”, keratoconus may be the reason. This guide explains what keratoconus is, how it is confirmed, what the treatment options are at each stage, and what to look for when choosing an eye care centre in a city like Mumbai.
What keratoconus actually is
The cornea is the clear, dome-shaped front window of the eye. In keratoconus, the cornea gradually thins and bulges forward into a cone shape. Because light no longer enters evenly, the image reaching the retina is distorted.
Keratoconus usually starts in the teens or early twenties and can progress until the mid-thirties, after which it tends to stabilise. It often affects both eyes, though one is usually worse. Risk factors include a family history, vigorous eye rubbing, allergic eye disease (common in dusty, humid cities) and conditions such as Down syndrome.
Signs that should prompt a check
- Frequent changes in glasses prescription, especially rising astigmatism
- Blurred or “ghosted” vision that glasses do not fully correct
- Glare and halos around lights at night
- Increased light sensitivity and eye strain
- Constant eye rubbing, particularly in children with allergies
- A sudden drop in vision with pain and a cloudy cornea (this is an emergency called corneal hydrops; see an eye doctor the same day)
How keratoconus is diagnosed
A routine vision test can miss early keratoconus. Diagnosis relies on corneal imaging:
- Corneal topography maps the curvature of the front surface and shows the characteristic steepening.
- Tomography (Scheimpflug or OCT-based) measures corneal thickness and the back surface, which changes before the front does, so it catches earlier disease.
- Pachymetry records the thinnest point of the cornea, which guides whether cross-linking is safe.
- Refraction and slit-lamp examination complete the picture.
Topography is repeated every six to twelve months to check whether the cone is progressing. Progression, not just the presence of keratoconus, decides whether active treatment is needed.
The treatment ladder
Keratoconus management follows a step-wise approach. Most people never need every rung.
Step 1: Glasses
In mild cases, spectacles with cylinder correction give acceptable vision. They stop working well once the cornea becomes irregular.
Step 2: Specialty contact lenses
Contact lenses often remain the main way to see clearly, because a rigid lens surface replaces the irregular cornea as the eye’s optical front. Options include:
- Rigid gas-permeable (RGP) lenses: small, durable, excellent optics, but need an adaptation period.
- Hybrid lenses: a rigid centre with a soft skirt for comfort.
- Scleral lenses: large lenses that vault over the cornea and rest on the white of the eye; very comfortable and suited to advanced or post-surgical corneas.
Fitting these lenses is a specialised skill. A practice with dedicated keratoconus fitting experience and trial lens sets, such as the contact lens service at a long-established Mumbai eye care practice, will usually need two to four visits to finalise a fit.
Step 3: Corneal cross-linking (CXL)
Cross-linking is the only treatment shown to slow or halt progression. Riboflavin (vitamin B2) drops are applied to the cornea, which is then exposed to ultraviolet-A light. This stiffens the collagen fibres so the cornea resists further bulging. It does not usually improve vision dramatically; its job is to stop things getting worse, so glasses or lenses remain necessary afterwards.
CXL is advised when imaging shows progression, typically in younger patients with enough corneal thickness. Recovery takes about a week, with a bandage contact lens and drops. Anyone considering keratoconus cross linking should ask whether the epithelium-off or epithelium-on protocol is proposed and why.
Step 4: Surgical options
- Intracorneal ring segments (INTACS) flatten the cone to improve contact lens tolerance.
- Corneal transplant (DALK or penetrating keratoplasty) is reserved for advanced disease with scarring or when lenses can no longer be fitted. Only a small minority of patients reach this stage.
Indicative costs in India
Costs vary by city, hospital, technique and how many visits are needed, so treat these only as approximate ranges:
| Item | Approximate range (INR) |
|---|---|
| Topography/tomography scan | 1,500 – 4,000 |
| RGP or hybrid lens (per lens) | 4,000 – 12,000 |
| Scleral lens (per lens) | 15,000 – 40,000 |
| Cross-linking (per eye) | 25,000 – 60,000 |
| Corneal transplant (per eye) | 60,000 – 1,50,000+ |
Ask the treating clinic for an itemised written estimate; the figures above are not quotations.
What to look for in a Mumbai eye care centre
When comparing options for keratoconus treatment in mumbai, check for:
- In-house corneal imaging so scans are not outsourced and progression can be tracked on the same machine.
- Specialty lens fitting with trial sets for RGP, hybrid and scleral lenses, and staff trained to teach insertion and removal.
- Access to cross-linking and corneal surgery, or a clear referral pathway to a corneal surgeon.
- A follow-up schedule written down, with topography repeated at defined intervals.
- Allergy management, since controlling itching and eye rubbing is part of protecting the cornea.
- Convenient branches, because lens fitting means repeat visits; a practice with locations across the city reduces travel time.
A personalised eye examination that includes corneal mapping is the right starting point if you have any of the symptoms listed above. Early diagnosis widens your options for keratoconus treatment in mumbai, while a late diagnosis can close the window for cross-linking.
Disclaimer: This article is for general information only and is not a substitute for medical advice. Please consult a qualified eye doctor for diagnosis and a treatment plan suited to your eyes.