Posters

Ocular goniometer

Poster Details

First Author: S.Nebro SPAIN

Co Author(s):    S. Lozano   L. Salcedo                 

Abstract Details

Purpose:

The purpose of this poster is to propose a new gadget for the surgical treatment of astigmatism, which has a double function: 1. Marking the desired axis in Intraocular toric lenses implant in cataract surgery ICL toric implant arcuate incision 2. Measuring the axis in which a certain mark is located Relocating misaligned toric lenses Researching the behavioural pattern of toric lenses in the immediate post-operative period.

Setting:

The markers used in toric-lenses implants are either manual and imprecise or highly costly. We present a new gadget that allows to mark the eye surface  bettering the efficacy of the already existing systems. The gadget can also measure the position in which a misaligned toric lens is located..

Methods:

The ocular-goniometer consists of two transparent circles, a fixed one, adjusted from 0º-to-180º, and a movable one, which contains a mark that spins around the first circle. That mark is turned until being positioned on the desired axis. Once the desired axis is selected, the marking part  is placed in the front of the second circle. To do so, the goniometer is laid on the patient’s face. Finally, we check the stabilisation of the gadget (aided-by-an-inclinometer) and press a mechanism that triggers the marking part, making it contact with the eye surface and, thus, marking the desired axis.

Results:

This way, we achieve an indicator with see-through means that allows direct observation of the patient’s eye while we proceed with the marking. The same system allows us to determine the position in which the toric-lens is misaligned, so the correct calculations for its relocation can be made. The gadget makes a goniometric circumference focussed on the patient’s visual axis, which is perpendicular to the floor level.

Conclusions:

The ocular goniometer is a new gadget that can be used as a single-step, quick, precise, and inexpensive indicator. It is the only existing indicator in which the surgeon is seeing the patient’s eye. It would increase significantly the number of ophthalmologists who would implant toric-lenses.

Financial Disclosure:

None