More than 40% of Maghreb patients have corneal thickness below limit for refractive surgery
PARIS Central corneal thickness in the north-African population of Algeria, Tunisia and Morocco is lower than the average thickness calculated in Europe and central Africa, according to a study.
"Conventionally, what we consider a 'normal' cornea, which can be candidate to refractive surgery, has a thickness of at least 500 µm. Thinner corneas are at a risk for ectasia, haze and less predictable refractive outcomes. If we take this limit into consideration, more than 40% of Maghrebians should be excluded from refractive surgery," Sihem Lazreg, MD, said at the meeting of the French Society of Ophthalmology.
The study involved 1,615 patients from the three Maghreb countries and a control group of 200 patients from France and 170 patients from the Ivory Coast.
"The difference with both control groups was quite remarkable. More than 40% of the Maghreb patients had a corneal thickness of less than 500 µm. Is the cause environmental, genetic or something else? We don't know. For sure, our choices in refractive surgery will be affected," Dr. Lazreg said.
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