We used a commonly implantated intraocular lens Tecnis One (Abbott Medical Optics, Illinois, USA). Therefore, the aim of this study was to evaluate the pupil size of healthy participants at different well defined illumination levels before and after cataract surgery. This device offers high comparability and standardisation for research purposes. reported on most precise measurements with PupilX. A recently developed pupillometer PupilX (MEye Tech GmbH) enables to measure bilateral pupil sizes with indirect infrared illuminance conditions simultaneously under constant and adjustable illumination levels, facilitating comparable measurements under scotopic, mesopic and photopic conditions. Furthermore, multiple binocular measurements gain a precise description of pupil behaviour before refractive surgery. In clinical routine, precise and easy measurement of pupil size is important for planning and outcome of refractive surgery. In contrast, studies under well-defined mesopic and photopic illumination conditions are rare. The majority of previous pupil size studies were performed under scotopic conditions in healthy eyes. Previously, many studies compared various pupillometers and demonstrated a disparity of the pupil size among different devices. A retreating pupil size with age has been reported already. Kanellopoulos could show with a Scheimpflug-system that a cataract extraction surgery reduced photopic pupil size and induced a more circular shaped pupil, appearing more significant with increasing age. Earlier studies reported influence of cataract surgery on pupil size. So far, there are controversial studies about a large scotopic pupil size as a potential risk factor for night vision complaints including halos, glare and vision deterioration. The pupil size and its relation to visual outcome in cataract and refractive surgery is an important element of optical quality. Pupillometer, PupilX, Pupil size, Digital pupillometer, Cataract surgery The variability of illuminance conditions of PupilX allows the possibility of investigations of pupil size in relation to refractive surgery. After 4 weeks postoperatively pupil size returned to approximately preoperative levels. Four weeks after cataract surgery mean pupil diameter increased back to comparably preoperative pupil size.Ĭonclusion: In conclusion, this study showed a significant decrease of pupil size after cataract surgery in a normal population under scotopic, mesopic and photopic static illuminance conditions. One week after cataract surgery mean pupil diameter for all patients decreased significantly by 13.1% at 0 Lux, 13.6% at 0.5 Lux, 8.4% at 4 Lux, 7.3% at 32 Lux and 5.1% at 250 Lux. Beside the gradually decreasing pupil size with an increasing illumination level there is a significant decreased pupil size after cataract surgery at all illumination levels. Results: This prospective study analysed the pupil size of 35 patients (mean age 73.2 ± 8.6 years, range 50-87 years). The absolute linear camera resolution was approximately 20 pixels per mm. 90 images were recorded during a measurement period of 3 seconds. Measurements were performed by the same investigator. Methods: Pupil size of healthy study participants was measured with infrared-video PupilX pupillometer (MEye Tech GmbH) at 5 different illumination levels (0, 0.5, 4, 32 and 250 lux) before and after cataract surgery. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.īackground: The aim of this study was to evaluate the influence of cataract surgery on pupil size at well-defined measurement conditions with a novel pupillometer (PupilX). Annekatrin Rickmann, Knappschaft Eye Clinic Sulzbach, Knappschaft Hospital Saar, An der Klinik 10, 66280 Sulzbach/Saar, Germany, Tel: 06897574-1119, Fax: 06897574-2139, E-mail: Int J Ophthalmol Clin Res, IJOCR-3-059, (Volume 3, Issue 3), Original Article ISSN: 2378-346X Received: | Accepted: J| Published: July 08, 2016Ĭitation: Rickmann A, Waizel M, Szurman P, Boden KT (2016) Relation of Pupil Size and Cataract Surgery using PupilX.
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