Original article
Effects of blur on Humphrey 24-2 results
Authors:
Henrietta L. Holmes-Smith ,
Orthoptic Department, Bournemouth Eye Unit, The Royal Bournemouth Hospital, Castle Lane East, Bournemouth, Dorset, BH7 7DW, GB
About Henrietta L.
BMedSci (Hons)
Alison Y. Firth
Academic Unit of Ophthalmology and Orthoptics, University of Sheffield, Sheffield, GB
About Alison Y.
MSc DBO(T)
Abstract
Aim: To determine the effects of defocus on the retinal sensitivity within the central 2° and at 24° of the visual field and to compare the effect on the two areas.
Methods: Twelve normal subjects (aged 18–22 years) undertook three visual field tests on a Humphrey visual field analyser, one with a +3.00 DS lens, one with a +4.00 DS and one with a +5.00 DS. Mean threshold sensitivity was recorded in the central 2° and at 24°. Analysis of variance and paired t-tests were used for data analysis.
Results: Two participants were excluded. Analysis of the 10 remaining participants showed that the strength of lens used affected sensitivity (p < 0.0013), the difference Occurring when the +5.00 DS lens was used. Each lens had a similar effect on the central 2° and at 24° (p = 0.6706).
Conclusion: Threshold sensitivity was reduced with induced blur from plus lenses, without cycloplegia.
How to Cite:
Holmes-Smith, H.L. and Firth, A.Y., 2006. Effects of blur on Humphrey 24-2 results. British and Irish Orthoptic Journal, 3, pp.17–20. DOI: http://doi.org/10.22599/bioj.196
Published on
01 Jan 2006.
Peer Reviewed
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