Keratoconus is a condition where the cornea slowly thins and bulges forward into a cone shape, and one of the first things families ask is whether it's hereditary. Partly, yes. It does run in some families, but many people with keratoconus are the first in their family to be diagnosed, so genes are only part of the picture. The more useful point is that keratoconus can be caught early and stopped from getting worse, even though it can't be cured. Our keratoconus treatment team does this regularly, and the first step is usually a scan on the Pentacam HR. Until then, try not to rub your eyes.
Dr. Vaishal Kenia, Chairman and Medical Director at Eye Hospital in Mumbai, says: "Parents ask me if they've given it to their children, and I always tell them, you did nothing wrong. Think of it as a tendency. Some people are born with a cornea that's a bit weaker than normal, and it sometimes runs in families. But the tendency usually needs a push to switch on, and the push is often eye rubbing or allergies. So the cornea starts weak, gets rubbed and stressed for years, and slowly stretches into a cone. That's why I screen the family, and it's why I care about stopping the rubbing as much as I care about any procedure."
What Causes Keratoconus, and Is It Hereditary?
Family History and Genes
Here's the honest answer to the question you came with. Yes, there's a hereditary side, and having a parent, brother or sister with keratoconus raises your own odds a lot compared with other people. Roughly one in ten patients has an affected relative. But no single gene explains it, and most families don't have it at all. So a clear family history means get checked. No family history doesn't mean you're safe. If someone in your family has it, book a family screening, teenagers first.
Eye Rubbing
Of all the keratoconus causes, this is the one you can actually do something about. Hard, repeated, knuckle rubbing, the kind you do when your eyes itch or you're sleepy, bends and weakens the cornea over time. People rarely notice how much they do it. Ask your family. Anyone who's been told they rub a lot should get a cornea treatment check, since it often shows up early on a scan.
Allergies, Eczema and Other Health Links
Hay fever, eczema and asthma are all more common in people with keratoconus, mostly because they make you itch and rub. Sleep apnoea, Down syndrome, and some connective tissue conditions are linked too. None of these causes it by itself. It's the combination, a vulnerable cornea plus a trigger. Our keratoconus clinic looks at your whole history, not just the eye.
Why It Shows Up in the Teens and Twenties
It almost always starts young. Sixteen, twenty, twenty five. Inside the cornea there are collagen fibres, think of the cables holding up a bridge, and in keratoconus they slacken, so the middle gets thin and pushes forward. You feel nothing. No pain, no redness. All you notice is that your glasses never feel right, and the optician keeps changing the number. An Anterion scan maps the front and back of the cornea, and it can catch changes you'd never spot yourself.
How Does Keratoconus Progress, and Can It Be Stopped?
How It Usually Moves
Young corneas change fastest. Teens and people in their twenties can show keratoconus progression from one visit to the next, and then somewhere in the thirties or forties it tends to quieten down. Tends to. Some don't, so we keep checking. What you'd notice is glasses that keep changing, ghost images, glare at night, eyes that feel smeared. A test of how the cornea behaves under pressure, done with Corvis ST, helps tell whether it has settled.
Cross-Linking Is the Brake
What actually puts the brakes on is corneal cross-linking. We put riboflavin (vitamin B2) drops on the cornea and shine a measured dose of UV light over it, and that makes the collagen bind together tighter, like pulling the slack out of those cables. Let me be clear about what it isn't. It doesn't cure anything, and it won't win back vision you've already lost. What it does is stop things getting worse, or slow them a lot, and the earlier it's done, the more cornea you keep. It's part of our keratoconus treatment service.
Lenses and Rings to See Better
Cross-linking only locks the shape in place, it doesn't sharpen your sight. For that, most people end up in special lenses, hard gas permeable ones or big scleral ones that vault over the cone. A few get tiny rings slipped into the cornea to flatten it a little, and our FEMTO Z8 NEO femtosecond laser is used for some keratoconus procedures. What suits you depends on how your cornea looks on the scans.
Transplant Is the Last Step
Only a small number of people ever need one, usually when the cornea is badly scarred or too steep for any lens. It's a big decision, and it's done at the cornea treatment service. The point of catching keratoconus early is that most people never get there.
What Determines the Right Treatment Approach?
Whether It's Still Getting Worse
We don't treat what's already stable. So we scan again with Pentacam HR after a few months and compare. If the cornea has steepened, cross-linking is usually recommended. If it hasn't, we may just watch.
How Thick the Cornea Still Is
Cross-linking needs a certain thickness to be safe. Thin corneas can still be treated in some cases, but it changes the method. An OCT scan of the cornea's layers gives us the number we need.
Your Age
A fifteen year old with a rapidly changing cornea is treated differently from a forty year old whose numbers haven't moved in years. Younger usually means quicker action. If you're a parent, don't wait for a teenager to complain. Book a consultation at the first hint.
Whether You Were Planning on Laser Correction
Lots of people find out they have keratoconus when they go for a LASIK check. That's the system working. Regular LASIK isn't safe on a weak, bulging cornea, which is why scans come before any laser. If you've been told you're not a candidate, ask why.
Key Takeaway
- Yes, keratoconus can run in families, but most people with it have no relatives with it, and a family history only means you should get checked.
- Eye rubbing and allergies are the push that often switches it on. Stop the rubbing and treat the itch.
- Cross-linking can stop or slow it, but it can't cure it or undo what's been lost, so the earlier the better.
- Got a family member with keratoconus, or glasses that keep changing? Ring +91 75064 99962 and we'll scan you.
