Posters

Evaluation of Corneal Biomechanics and intraocular pressure before and after cataract surgery

Poster Details

First Author: T.Shiroyama JAPAN

Co Author(s):    S. Ito   H. Matsushima   M. Nagata   T. Seno           

Abstract Details

Purpose:

Evaluations of the influence of cataract surgery on Corneal Biomechanics and intraocular pressure (IOP).

Setting:

Department of Ophthalmology, Dokkyo Medical University, Tochigi, Japan.

Methods:

This study included 17 eyes of 9 patients (mean age, 76.8 ± 9.3 years; 6 men and 3 women), who underwent cataract surgery at Dokkyo Medical University Hospital. The patients with any other eye diseases were excluded. The same surgeon performed cataract surgery through a single-plane 2.4 mm corneal incision. IOP was measured using the non contact tonometer (TONOREFII; Nidek Corp). Corneal Biomechanical parameters, IOPnct (Intra Ocular Pressure no corrected) and bIOP (Biomechanical corrected IOP) were measured using the dynamic Scheimpflug analyzer (Corvis®ST; Oculus). These parameters were compared for differences between before surgery and one week after surgery.

Results:

There was no significant difference in IOP and IOPnct between preoperative and postoperative. bIOP was significantly decreased postoperatively (P=0.009). In corneal biomechanical parameters, High Concavity Time and Deformation Amplitude ratio are significantly decreased postoperatively (P=0.02; P=0.009).

Conclusions:

In this study, there was no significant difference in IOP and IOPnct between preoperative and postoperative, but there was significant difference between preoperative and postoperative bIOP. At the early stages of post cataract surgery, changes in Corneal Biomechanics may relate to a decreased postoperative bIOP. In addition, there is a possibility that the Deformation Amplitude ratio is decreased postoperatively and the cornea tends to be harder, which is affecting the IOP measurements.

Financial Disclosure:

None