RESUMO
·AIM: To evaluate higher order aberrations (HOAs) of the corneal surface in normal and keratoconic eyes. ·METHODS:Using an OPD-Scan Ⅱ wavefront analyzer, aberrometric parameters of the corneal surface in one eye of 80 patients with keratoconus (KC) and 91 participants with normal eyes were evaluated. The Zernike coefficients from third- to sixth-order as well as root mean square (RMS) of primary coma, coma-like aberrations, and total HOA were calculated and compared between both groups. · RESULTS: Statistically significant differences were found in all aberrometric parameters between the measurements of the KC and normal participants (P<0.001). All of the aberrometric parameters were significantly higher in the KC patients compared to the normal group (P<0.001). ·CONCLUSION: Corneal wavefront measurements by means of OPD - Scan Ⅱ were significantly higher in keratoconic corneas than normal corneas.
RESUMO
A 52‑year‑old male patient presented at our hospital with unilateral proptosis and vision loss in his left eye. Imaging evaluations showed orbital tumor, so the patient underwent surgery. About an hour later after tumor removal, patient developed sudden vision loss and became no light perception. Fundus evaluation revealed central retinal artery occlusion (CRAO). The patient was treated immediately with ocular massage and anterior chamber paracentesis as well as systemic therapy with mannitol and intravenous administration of acetazolamide. After thirty minutes, he recovered perception to light and then hand motion and 2 h later, it was improved to 1 m counting finger. CRAO following orbital tumor has not been reported before. We recommend ocular examination in all patients that undergo orbital surgery immediately to 2–3 h after surgery.