Effect of trabeculectomy on ocular and corneal higher order aberrations

Abstract

Ocular coma-like and total aberrations were significantly increased at 1 month after trabeculectomy with a limbal-based conjunctival flap, but they had returned to normal levels by 3 months.

Effect of Trabeculectomy on the Ocular Higher Order Aberrations in Patients with Open Angle Glaucoma

“…Several studies have demonstrated that ocular surgeries such as intraocular lens implantation and cataract extraction [ 9 - 11 ], scleral buckling [ 12 ], and pterygium excision [ 13 ] may result in changes in the refractive state or higher-order aberrations [ 14 - 16 ] in the affected eye. In the present study, consistent with previous studies, we report similar changes in ocular higher-order aberrations 1 month postoperatively.…”

“…Some studies have attributed these alterations in visual acuity to changes in corneal contour, anterior chamber depth, axial length of the globe, and thickness of the crystalline lens [ 6 , 18 - 23 ]. Another study demonstrated with vector analysis that the cylinder component of refraction was increased by 1.4 D; however, the vector power of surgically induced refractive change at 1 month postoperatively did not significantly correlate with corneal coma-like, spherical-like, or total RMS, suggesting that changes other than anterior corneal aberration, such as internal optics of the eye, play a role in the changes in higher-order aberrations postoperatively[ 14 ]. Francis et al [ 23 ] reported a decrease in the axial length of the globe following trabeculectomy that was more prominent 1 week and 1 month after surgery, and suggested over-filtration as the explanation for their finding; however, similar to our findings, Fukuoka et al [ 14 ] have shown that despite the stability of IOP from 1 month to 3 months postoperatively, the values of ocular coma-like, spherical-like, and total higher order aberrations changed during this time period and reached values similar to preoperative measures.…”

“…One of the most effective procedures for lowering IOP is trabeculectomy, with or without anti-fibrotic agents. On the other hand, many patients report changes in their vision following trabeculectomy surgery, such as choroidal detachment, corneal decompensation, hypotony, maculopathy and infection [ 1 - 8 ], which may be complications of the surgery, or, as in other ocular surgeries, including intraocular lens implantation and cataract extraction [ 9 - 11 ], scleral buckling [ 12 ], or pterygium excision [ 13 ], may be the result of changes in refractive state or higher-order aberrations [ 14 - 16 ] of the eye. The present study is an evaluation of the impact of trabeculectomy surgery on ocular higher-order aberrations.…”

Post‐trabeculectomy ocular biometric changes

“…Along with corneal steepening, higher order aberrations including ocular coma‐like and total aberrations increase significantly at one month post‐trabeculectomy but return to normal levels by three months . The corneal coma‐like and total aberrations remain unchanged during the first three post‐operative months and there is no significant correlation between the ocular and corneal coma‐like aberrations and between the ocular and corneal total aberrations at one month post‐trabeculectomy .…”

Comparative analysis of optical aberrations, anatomical and optical parameters of the cornea in glaucoma surgery

“…В литературе также встречаются единичные сообщения, посвященные детальному анализу рефракционных изменений роговицы в хирургии глаукомы [8][9][10]. Хирургические манипуляции на фиброзной оболочке глаза неизбежно приводят к вторичным изменениям его оптической структуры [11,12].…”