PMID: 8944187Sep 1, 1996Paper

A new computer assisted objective method for quantifying vascular changes of the bulbar conjunctivae

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
C G OwenE G Woodward

Abstract

A novel computer software method was used to quantify the conjunctival plexus on the scleral background for measurement of the vascular surface area from photographs. A previously described method was used (Palmer, J. R., Owen, C. G., Ford, A. M., Jacobson, R. E. and Woodward, E. G. (1996). Optimal photographic imaging of the bulbar conjunctival vasculature. Ophthal. Physiol. Opt. 16, 144-149) to optimise photographic imaging of the bulbar conjuctival vasculature by increasing the information content in the image. Repeatability of this technique was evaluated. Twenty subjects (20 eyes) free from ophthalmological and systemic abnormality were examined on two separate occasions. The maximum 95% confidence limits for repeatability are +8.58/-3.95%. For 10 consecutive estimates of vascularity the maximum 95% confidence interval lie between +/- 6.54%. To evaluate the technique the lateral-bulbar conjunctivaein 10 soft (SCL) and 10 rigid gas permeable contact lens (RGPCL) wearers during the first 10 months of contact lens wear, were assessed and compared with subjective grading of hyperaemia. The new method showed sufficient sensitivity in detecting increased hyperaemia in the RGPCL wearing group and demonstrated statistically signif...Continue Reading

Citations

Nov 24, 2005·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·James S Wolffsohn, Christine Purslow
Nov 24, 2005·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Nicola PritchardChris Hunt
Oct 23, 2013·Cornea·Tamaki SumiAtsuki Fukushima
Oct 19, 2004·The British Journal of Ophthalmology·J S Wolffsohn
May 4, 2007·The British Journal of Ophthalmology·Rachael Claire Peterson, James Stuart Wolffsohn
Dec 30, 2014·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Luigina SorbaraCraig Woods
Apr 15, 2016·Eye & Contact Lens·Wan ChenJianhua Wang
Jan 25, 2017·Current Eye Research·Mohd Radzi HilmiTengku Mohd Tengku Sembok
Mar 27, 2001·Optometry and Vision Science : Official Publication of the American Academy of Optometry·M CoveyB A Holden
Jun 1, 2000·Optometry and Vision Science : Official Publication of the American Academy of Optometry·E ChongD Fonn
Sep 23, 2009·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Marc M SchulzeTrefford L Simpson
Dec 1, 2007·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Marc M SchulzeTrefford L Simpson
Dec 2, 2011·Japanese Journal of Ophthalmology·Tsuyoshi YonedaAtsuki Fukushima

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