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Corneal Biomechanical Response Alteration After Scleral Buckling Surgery for Rhegmatogenous Retinal Detachment
Leonardo Taroni1, Federico Bernabei1, Marco Pellegrini1
1Department of Ophthalmology, S.Orsola-Malpighi University Hospital, University of Bologna, Bologna, Italy.
American Journal of Ophthalmology
|April 14, 2020
Summary
Scleral buckle surgery for retinal detachment lowers corneal hysteresis and corneal resistance factor, potentially impacting intraocular pressure measurements. This study highlights the biomechanical changes in the cornea after scleral buckle procedures.
Area of Science:
- Ophthalmology
- Corneal Biomechanics
- Retinal Detachment Surgery
Background:
- Rhegmatogenous retinal detachment (RRD) is a condition requiring surgical intervention.
- Scleral buckle (SB) surgery is a common treatment for RRD.
- The impact of SB on corneal biomechanics and intraocular pressure (IOP) requires further investigation.
Purpose of the Study:
- To compare corneal biomechanics between eyes treated with SB for RRD and their fellow eyes.
- To assess the effect of SB on intraocular pressure (IOP) measurements.
Main Methods:
- Retrospective, fellow-eye matched cohort study of 18 patients.
- Corneal biomechanical properties measured using Ocular Response Analyzer (ORA), including corneal hysteresis and corneal resistant factor (CRF).
- Intraocular pressure (IOP) measured by Goldmann applanation tonometry (GAT) and Ocular Response Analyzer (ORA).
Main Results:
- Operated eyes (SB treated) exhibited significantly lower corneal hysteresis and CRF compared to fellow eyes.
- Goldmann applanation tonometry (GAT) measured significantly lower IOP than corneal-compensated IOP in operated eyes.
- Corneal response during the second applanation event (A2) indicated faster movement in operated eyes.
Conclusions:
- Scleral buckle surgery alters corneal biomechanical response, likely due to scleral stiffening.
- Reduced corneal hysteresis post-SB may affect the accuracy of intraocular pressure (IOP) measurements.
- Clinical implications include the need for careful interpretation of IOP readings in patients who have undergone SB surgery.
