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“Corneal topography”, “OCT”, “ocular ultrasound”… These exam names can sound impressive, but they are painless, quick, and play an essential role: detecting eye diseases even before the first symptoms. Here is what each of them is for.
Why eye imaging tests?
A standard eye test measures what you see. Imaging goes further: it shows the real condition of your eye’s structures — cornea, retina, optic nerve. This is what makes it possible to detect keratoconus, glaucoma or retinal damage early, at a stage where treatment is most effective.
Corneal topography: the map of your cornea
Topography produces, in a few seconds, a relief map of the cornea, point by point. It is essential to:
- Detect and monitor keratoconus, even early and invisible on a simple examination;
- Validate refractive surgery (LASIK/PRK): a cornea is never operated on without mapping it;
- Fit special contact lenses (rigid, scleral) precisely.
A contactless, painless examination of a few minutes.
OCT: a scan of the retina and optic nerve
OCT (optical coherence tomography) makes very fine cross-sections of the retina and optic nerve, without any contact with the eye. It notably makes it possible to:
- Detect and monitor glaucoma by analyzing the optic nerve fibers;
- Monitor AMD (age-related macular degeneration);
- Detect retinal damage in diabetic patients (retinopathy, macular edema).
Ocular ultrasound: seeing when you can’t see
When the media of the eye are not transparent (very advanced cataract, hemorrhage), ultrasound makes it possible to examine the inside of the eye anyway. It is also used to measure the eye before cataract surgery (biometry).
How do these examinations work?
All these examinations are painless, last a few minutes each and are done at the practice, on the day of your consultation. Some require dilation of the pupil with drops: in that case, plan not to drive right after.
Who should have them?
- Anyone considering refractive surgery ;
- Patients who are diabetic (fundus check at least once a year);
- People with a family history of glaucoma or keratoconus ;
- After age 50, to screen for AMD and glaucoma;
- Any unexplained drop in vision.
Advanced eye imaging in Fez, Morocco
The Dr Oulehri Hassan eye-care centre in Fez has a complete suite ofadvanced eye imaging : corneal topography, OCT, ocular ultrasound and laser — for a precise diagnosis, on site, the same day.
A doubt about your eyes, or screening to do? Book an appointment or contact us at 0532-023012 / 0615-557141 (WhatsApp).