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Corneal Topography

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A painless map of the curvature of your cornea, used before laser vision correction and to check for an irregular corneal shape.

Corneal topography creates a colour-coded map of the curvature of your cornea, the clear window at the front of the eye. Small irregularities that cannot be seen in an ordinary examination may show up on this map.

Before laser vision correction

Topography is a key part of the evaluation for LASIK and Trans-PRK. An irregular corneal shape can mean that laser treatment is not safe for you, and it is much better to find this during the evaluation.

Keratoconus and contact lenses

The test also helps identify and follow keratoconus, a condition in which the cornea gradually thins and bulges, and can help in assessing astigmatism and fitting some contact lenses.

Who is this for?

Corneal topography may be advised if you:

  • Are being evaluated for LASIK, Trans-PRK or other refractive surgery.
  • Have keratoconus, or a rapidly changing astigmatism.
  • Have unexplained blurred vision that glasses do not fully correct.

What the procedure involves

  1. Contact lens wearers leave lenses out for the period advised beforehand, since lenses can alter the corneal surface.
  2. You rest your chin on the machine and look at a target.
  3. The image is taken in moments, and nothing touches your eye.
  4. Your doctor reviews the map alongside your other measurements, such as pachymetry.

Recovery and follow-up

There is no recovery time, and you can carry on with your day. If the test is one part of a refractive surgery evaluation, other tests or dilating drops at the same visit may blur your near vision for a few hours.

Dr. S.K. Bulchandani

Medical Director & Consultant Ophthalmologist

Dr. S.K. Bulchandani is the Medical Director of Divyajyoti Eye Hospital and has been practising ophthalmology for more than 20 years. He established the hospital in December 2001 at Jyoti Apartment on J.P. Road, opposite the 7 Bungalows Bus Depot in Andheri (West), and has led it since. In the years since, the hospital has cared for more than 1,00,000 patients from Andheri and the surrounding western suburbs of Mumbai.

His clinical work covers cataract surgery by phacoemulsification, laser vision correction including LASIK and Trans-PRK, the assessment and long-term management of glaucoma, and the detection and treatment of diabetic retinopathy. Diagnosis is supported by equipment available in-house, including the IOLMaster 500 for intraocular lens power calculation, ultrasound A-scan, pachymetry, gonioscopy, fundus photography and YAG laser.

Dr. Bulchandani practises in a NABH Pre-Accredited setting, where surgery is carried out in operation theatres maintained to NABH sterility guidelines, and he works alongside a team that numbers five eye specialists in all. He consults during the hospital's evening OPD, Monday to Saturday from 5:00 PM to 8:30 PM; the hospital is closed on Sunday.

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Common questions about Corneal Topography

Usually, yes. Lenses can temporarily change the corneal surface. You will be told how long to leave them out.

No. It is non-contact and takes only moments.

It helps detect an irregular corneal shape such as keratoconus, which can make laser treatment unsafe.

Ask us about Corneal Topography

OPD runs Mon - Sat 5 p.m. - 8.30 p.m. (closed Sunday). Call or WhatsApp us and our front desk will confirm a slot. Cashless mediclaim and TPA empanelment available.

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