ESCRS - MP14 - POSSIBILITIES OF MONITORING INTRAOCULAR PRESSURE USING EASYTON TRANSPALPEBRAL TONOMETER IN CASES OF CORNEAL SURGERY

POSSIBILITIES OF MONITORING INTRAOCULAR PRESSURE USING EASYTON TRANSPALPEBRAL TONOMETER IN CASES OF CORNEAL SURGERY

Published 2023 - 27th ESCRS Winter Meeting

Reference: MP14 | Type: Presented Poster & Poster Submission | DOI: 10.82333/c5nv-5j89

Authors: Maria A. Angeles del Buey* 1 , Paula Casas 1 , Nuria López 1 , Sara Marco 1 , Enrique Minguez 1 , Francisco J Ascaso 1

1Ophthalmology,HOSP. CLINICO UNIVERSITARIO LOZANO BLESA,Zaragoza,Spain

Purpose

To compare the effectiveness of transpalpebral scleral tonometry (TPST) and Goldmann applanation tonometry (GAT) in a control group patient, in order to consider TPST as an objective IOP control in early postoperative period of patients undergoing corneal and surface surgery. 

Setting

Hospital Clínico Universitario Lozano Blesa, Zaragoza, Spain

Methods

Three measurements TPST, using EASYTON tonometer, and IOP using GAT, have been sequentially performed on 73 right eyes of 73 control patients (aged 24–83) (mean age 57.4±16.3 years). In addition, 12 eyes of 12 patients undergoing corneal or surface surgery (PK, DSAEK, pterigium) have been evaluated with TPST and digital palpation tonometry in the immediate postoperative period (1-2 and 7 days). We evaluated the post-surgical cases subjectively in normal tone by palpation, ocular hypotonia and hypertonia. Subsequently, we carried out an objective IOP measurement with Easyton and assessed the correlation of results.

Results

Mean IOP spread (as demonstrated by three consecutive IOP measurements with EASYTON) was 1.32 mm Hg thus showing a high degree of repeatability. IOP measured using the TPST was 18.2 ± 2.9 mmHg in the control group. With GAT were 18.3 ± 2.5 mmHg in the control group. There are no statistically significant differences between both variables for the same sample. During the second evaluation, a high degree of the similarity of IOP measurements with palpation and TPST was demonstrated in the operated eyes after corneal and surface surgery.

Conclusion

EASYTON tonometry demonstrated repeatability of IOP indicators when measuring the same eye three times sequentially. There are no statistically significant differences between TPST and GAT in the control group. EASYTON transpalpebral IOP tonometer prevents the subjectivity of IOP measurements after PK and other corneal or surface surgeries and makes an objetive tonometry available. The lack of the contact with the cornea, a rather high accuracy and repeatability, and the lack of negative effects allow for using this device in these cases.