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[Correlations between factors and intraocular pressure following photorefractive keratectomy]
1Department of Ophthalmology, The First Affiliated Hospital, Suzhou Medical College, Suzhou 215006.
Objective:
To evaluate the factors related to intraocular pressure (IOP) after excimer laser photorefractive keratectomy (PRK).
Methods:
86 cases 150 eyes of myopia followed over six months after PRK were studied with noncontact tonometer (NCT).
Result:
After PRK, a decrease in the IOP was observed. Post-operatively, the IOP reading at 1st month was the highest. The reduction of IOP may be related to the decrease in corneal thickness and corneal curvature (r = 0.361, P < 0.01; r = 0.188, P < 0.05). Regression equation for IOP drop (kPa) = - 0.059 - 0.038X(1) + 0.009X(2)[X(1) = ablation depth (microm), X(2) = decrease in corneal curvature (D)].
Conclusion:
IOP readings after PRK are influenced by corneal thickness, corneal curvature and eye drug times.