Abstract
To evaluate the modification of corneal optical densitometry following photorefractive keratectomy (PRK) using Scheimpflug topography. Corneal densitometry (0 to 100 grayscale units [GSU]), pachymetry, and keratometry were evaluated using a rotating Scheimpflug camera (Pentacam HR; Oculus Optikgeräte, GmbH, Wetzlar, Germany) at baseline and 1 and 3 months following PRK in myopic patients. Subjective refraction, uncorrected distance visual acuity, corrected distance visual acuity, and corneal haze (0 to 4 on common subjective scale) were evaluated preoperatively at baseline, 1 month, and 3 months. The study included 75 eyes (38 right eyes, 37 left). The preoperative mean spherical equivalent and cylinder were -2.28 ± 1.24 and 0.92 ± 0.65 diopters (D), respectively. Maximal corneal densitometry (central 4 mm) was 27.44 ± 1.93 GSU at baseline. At 1 month postoperatively, corneal haze with a mean clinical grade of 0.54 ± 0.45 (P < .0001) was observed, associated with corneal densitometry increased to 29.69 ± 5.16 GSU (P > .05). At 3 months postoperatively, mean clinical haze decreased to 0.11 ± 0.24 (P < .0001) and was associated with a significant decrease (P < .0001) in maximal densitometry (25.13 ± 3.42 GSU). Corneal densitometry could represent a useful objective measurement of postoperative mild corneal haze and aid in the rating and follow-up of refractive surgery. [J Refract Surg. 2016;32(11):788-791.].
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
