FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W4240838999> ?p ?o ?g. }

• W4240838999 abstract "Abstract Background: To understand which irregular corneal parameters determine the visual quality in keratoconus subjects. Methods: The cross-sectional study examined the eyes of 44 subjects, graded from the first to third keratoconus stages by Amsler-Krumeich classification. We obtained measurements in two ways: (a) by projecting two perpendicular axes onto a cornea (first, through the central point of the cornea and keratoconus apex; second, as the perpendicular axis) to read the elevation values at points on these axes as parameters characterising the corneal surface; (b) by projecting circles with different diameters around the central part of the cornea (1, 2, and 3 mm) and reading elevation values at points equally displaced on these circles as parameters characterising an anterior surface slope. Irregular corneal shape parameters’ correlations with visual acuity and contrast sensitivity were determined in order to understand which corneal slope parameter has the strongest correlation with visual acuity and contrast sensitivity. Results: Parameters characterising the corneal surface’s correlations with contrast sensitivity were from r=0.25 (p=0.03) at 3 cpd to r=0.47 (p<0.01) at 9 cpd for the highest elevation and from r=0.33 (p=0.09) at 5 cpd to r=0.40 (p<0.01) at 11 cpd for the lowest elevation in all subjects together, while for visual acuity the parameters were r=0.30 (p<0.01) for the highest elevation and r=0.21 (p=0.06) for the lowest elevation in all subjects together. The correlation between contrast sensitivity and the highest and lowest corneal point in all measured cornea was stronger for subjects with a peripheral corneal apex than for those with a central apex. In keratoconus subjects, contrast sensitivity displayed a strong correlation with slope in the central part of the cornea (with a radius of 1 mm) ranging from 0.48 (p<0.01) at 3 cpd to 0.61 (p<0.01) at 9 cpd. Conclusion: Contrast sensitivity has a higher correlation with corneal shape parameters than with visual acuity. Subjects with a peripheral corneal apex had stronger correlations with visual acuity and contrast sensitivity than did subjects with a central apex. In keratoconus subjects, the strongest correlation was for contrast sensitivity and elevation (slope) in the region within a 1 mm radius of the corneal centre in the opposite direction of the keratoconus apex (direction (ax) CB)." @default.
• W4240838999 created "2022-05-12" @default.
• W4240838999 creator A5042172636 @default.
• W4240838999 creator A5042709948 @default.
• W4240838999 creator A5053900316 @default.
• W4240838999 date "2020-11-20" @default.
• W4240838999 modified "2023-09-28" @default.
• W4240838999 title "The Impact of Irregular Corneal Shape Parameters on Visual Acuity and Contrast Sensitivity" @default.
• W4240838999 doi "https://doi.org/10.21203/rs.2.23099/v5" @default.
• W4240838999 hasPublicationYear "2020" @default.
• W4240838999 type Work @default.
• W4240838999 citedByCount "0" @default.
• W4240838999 crossrefType "posted-content" @default.
• W4240838999 hasAuthorship W4240838999A5042172636 @default.
• W4240838999 hasAuthorship W4240838999A5042709948 @default.
• W4240838999 hasAuthorship W4240838999A5053900316 @default.
• W4240838999 hasBestOaLocation W42408389991 @default.
• W4240838999 hasConcept C118487528 @default.
• W4240838999 hasConcept C119767625 @default.
• W4240838999 hasConcept C120665830 @default.
• W4240838999 hasConcept C121332964 @default.
• W4240838999 hasConcept C199631012 @default.
• W4240838999 hasConcept C2524010 @default.
• W4240838999 hasConcept C2776502983 @default.
• W4240838999 hasConcept C2776882836 @default.
• W4240838999 hasConcept C2778257484 @default.
• W4240838999 hasConcept C2778918178 @default.
• W4240838999 hasConcept C2781053140 @default.
• W4240838999 hasConcept C33923547 @default.
• W4240838999 hasConcept C37054046 @default.
• W4240838999 hasConcept C71924100 @default.
• W4240838999 hasConceptScore W4240838999C118487528 @default.
• W4240838999 hasConceptScore W4240838999C119767625 @default.
• W4240838999 hasConceptScore W4240838999C120665830 @default.
• W4240838999 hasConceptScore W4240838999C121332964 @default.
• W4240838999 hasConceptScore W4240838999C199631012 @default.
• W4240838999 hasConceptScore W4240838999C2524010 @default.
• W4240838999 hasConceptScore W4240838999C2776502983 @default.
• W4240838999 hasConceptScore W4240838999C2776882836 @default.
• W4240838999 hasConceptScore W4240838999C2778257484 @default.
• W4240838999 hasConceptScore W4240838999C2778918178 @default.
• W4240838999 hasConceptScore W4240838999C2781053140 @default.
• W4240838999 hasConceptScore W4240838999C33923547 @default.
• W4240838999 hasConceptScore W4240838999C37054046 @default.
• W4240838999 hasConceptScore W4240838999C71924100 @default.
• W4240838999 hasLocation W42408389991 @default.
• W4240838999 hasLocation W42408389992 @default.
• W4240838999 hasLocation W42408389993 @default.
• W4240838999 hasOpenAccess W4240838999 @default.
• W4240838999 hasPrimaryLocation W42408389991 @default.
• W4240838999 hasRelatedWork W12556169 @default.
• W4240838999 hasRelatedWork W12649837 @default.
• W4240838999 hasRelatedWork W12957974 @default.
• W4240838999 hasRelatedWork W14184305 @default.
• W4240838999 hasRelatedWork W15324747 @default.
• W4240838999 hasRelatedWork W8109117 @default.
• W4240838999 hasRelatedWork W8179645 @default.
• W4240838999 hasRelatedWork W8679586 @default.
• W4240838999 hasRelatedWork W9817862 @default.
• W4240838999 hasRelatedWork W12700947 @default.
• W4240838999 isParatext "false" @default.
• W4240838999 isRetracted "false" @default.
• W4240838999 workType "article" @default.