The effect of trabeculectomy on contrast sensitivity, corneal topography and aberrations
- 71 Downloads
To investigate the effect of trabeculectomy on corneal topography, corneal sensitivity and aberrations.
Twenty-four eyes of 24 subjects with open-angle glaucoma who required glaucoma filtration surgery were assessed. The evaluation of corneal topography, corneal sensitivity and aberrations were done before the trabeculectomy procedure, 1 week and 1 month after the trabeculectomy.
There were significant differences in cylindrical power (P = 0.02), contrast sensitivity at 12 cycle/degree spatial frequency (P = 0.04) as well as high order aberration (P = 0.04) and high order without spherical component (P = 0.02) following trabeculectomy. However, significant differences were found for keratometric results and Fourier index in 3 and 6 mm pupil diameters between pre- and post-trabeculectomy (P > 0.05).
According to the findings of the current study, trabeculectomy affects contrast sensitivity at 12 cycle/degree spatial frequency, higher-order aberration and higher order without spherical component aberration 1 month after trabeculectomy. Being knowledgeable about these changes may lead to some advancement in post-surgical management of patients particularly in early stages following trabeculectomy.
KeywordsTrabeculectomy Corneal topography Contrast sensitivity Aberrations
Deputy of Research of Mashhad University of Medical Sciences, Iran (Grant Code: 922878).
Compliance with ethical standards
Conflict of interest
All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership or other equity interest; and expert testimony or patent-licensing arrangements) or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.
All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.
Informed consent was obtained from all individual participants included in the study.
- 1.Resnikoff S, Pascolini D, Etya’ale D, Kocur I, Pararajasegaram R, Pokharel GP, Mariotti SP (2004) Global data on visual impairment in the year 2002. Bull World Health Organ 82:844–851Google Scholar
- 2.European Glaucoma Society (2011) Terminology and guidelines for glaucoma, 3rd edn. http://www.eugs.org/eng/EGS_guidelines.asp. Accessed 21 Jan 2011
- 5.Spaeth GL (1980) A prospective, controlled study to compare the Scheie procedure with Watson’s trabeculectomy. Ophthalmic Surg 11:688–694Google Scholar
- 7.Kanski JJ (2016) In: Bowling B (ed) Kanski’s clinical ophthalmology: a systematic approachGoogle Scholar
- 15.Rosen WJ, Mannis MJ, Brandt JD (1992) The effect of trabeculectomy on corneal topography. Ophthalmic Surg 23:395–398Google Scholar