Pachometry before and after vitrectomy with silicone oil injection

Area of Science:

• Ophthalmology
• Retinal Surgery
• Corneal Physiology

Background:

• Vitrectomy often requires vitreous substitution to maintain intraocular pressure and retinal stability.
• Silicone oil is a common vitreous substitute, but its effect on corneal health requires evaluation.
• Understanding the impact of different vitreous substitutes on central corneal thickness (CCT) is crucial for patient outcomes.

Purpose of the Study:

• To compare central corneal thickness (CCT) changes after vitrectomy using silicone oil versus other vitreous substitutes.
• To determine if silicone oil causes more frequent or severe corneal decompensation.
• To assess the reversibility of CCT changes post-vitrectomy.

Main Methods:

• Ultrasonic pachometry was used to measure CCT in 42 eyes.
• Eyes were divided into two groups: silicone oil (25 eyes) and C3F8, air, or saline (17 eyes).
• CCT measurements were taken pre-operatively and at 24 hours, 48 hours, and five months post-operatively.

Main Results:

• Progressive central corneal thickening was observed in both groups.
• Silicone oil eyes showed a maximum CCT increase of 14.1% at 48 hours post-operatively.
• CCT returned to baseline values in both groups by the five-month follow-up; silicone oil did not induce significantly different CCT changes.

Conclusions:

• Silicone oil injection during retinal detachment surgery leads to reversible corneal decompensation.
• The degree of corneal decompensation induced by silicone oil is comparable to other vitreous substitution materials within five months.
• These findings suggest silicone oil is a safe option regarding short-term corneal health in vitrectomy patients.