Results of toric intraocular lens calculation in patients with dry eye syndrome

Session Details

Session Title: Presented Poster Session: Toric Lenses & IOL Power Calculation

Venue: Poster Village: Pod 1

First Author: : I.Duras UKRAINE

Co Author(s): :                           

Abstract Details

Purpose:

To analyze the stability of keratometric parameters in patients with cataracts and astigmatism, who planned the implantation of a toric IOL, depending on the parameters of the tear meniscus and application of tear-replacing agents.

Setting:

Department of Ophthalmology, Kharkov Medical University and Ophthalmology Diagnostic Center “ZIR”, Kharkov, Ukraine.

Methods:

22 patients, candidates for implantation of thoracic IOL, who had different results in the process of repeated keratometry, were examined. All patients underwent preoperative keratorefractometry, corneal topography and aberration, OCT parameter of the tear meniscus - tear meniscus height (TMH) and the Schirmer I test. All patients had corneal astigmatism of varying degrees from 1.5 D to 4.5 D. Hyaluronic acid preparation Artelac Splash (Bauch + Lomb) was prescribed 1 drop 3 times a day for 2 weeks and then a complex of studies was repeated.

Results:

Analyzing keratometry data before and after instillations, the following results were obtained: corneal astigmatism at the beginning of the study averaged 2.15 ± 0.45 D, after 2 week - 1.85 ± 0.35 D. The Schirmer I test did not change (P > 0.05), but TMH increased (P < 0.05) from 0.175+/-0.068 mm to 0.197+/-0.095 mm. Thus, there is a significant change in the keratometry data against the background of the use of tear replacements in patients suffering from the "dry" eye syndrome. In 2 cases, the implantation of a toric lens was irrelevant.

Conclusions:

Lack of tears can cause transient irregular astigmatism and distort keratometry data, and as a result, lead to "overdiagnosis" of corneal astigmatism, misdirection and selection of IOL in patients with cataract and dry eye syndrome, and unreasonable implantation of toric IOLs. The appointment of a lacrimal replacement preparations for patients with dry eye syndrome helps to avoid refractive errors in the calculation of the toric IOL.

Financial Disclosure:

None