PMID: 15220725Jun 29, 2004Paper

Frequency-doubling perimetry in patients following penetrating keratoplasty

Cornea
Nhung X NguyenMichael Küchle

Abstract

Perimetry using a frequency-doubling technique (FDT perimetry) is becoming established as a new diagnostic tool to detect early visual field losses. The aim of this study was to evaluate the diagnostic usefulness of an FDT perimetry protocol (C-20-5) in patients after penetrating keratoplasty (PK) and to assess whether this method is influenced by postoperative corneal topographic changes. Thirty-six patients (age 40 +/- 13, median 41 years) following PK and 68 age-matched controls were included in this study. The postoperative interval was 21 +/- 19, median 14 months. Patients with preexisting glaucoma or any postoperative intraocular pressure elevation were excluded. The indications for PK were keratoconus in 82%, Fuchs dystrophy in 15%, and secondary bullous keratopathy in 3%. In 19 patients keratoplasty was performed in 1 eye. FDT perimetry was evaluated in both eyes to judge intraindividual variability. FDT perimetry was done using the screening strategy, which begins testing at the normal 5% probability level. If a stimulus is not detected, further targets are presented. FDT viewfinder and statistics software were used for case-wise recalculation of all missed localized probability levels. Neither mean overall FDT score (...Continue Reading

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Citations

Feb 9, 2012·Journal of Ophthalmology·Ammar M Al-MahmoodDeepak P Edward
Oct 18, 2014·Seminars in Ophthalmology·Ramez I Haddadin, James Chodosh
Jul 9, 2010·International Ophthalmology Clinics·Nir ShohamIqbal Ike K Ahmed
Oct 12, 2010·International Ophthalmology Clinics·Yvette M Jockin, Sheila Fallon Friedlander
Aug 6, 2021·Therapeutic Advances in Ophthalmology·Lisa-Marie AndersMatthias C Grieshaber

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