RT Journal Article
T1 Characterization of Corneoscleral Geometry Using Fourier Transform Profilometry in the Healthy Eye
A1 Piñero, David Pablo
A1 Martínez Abad, Antonio
A1 Soto Negro, Roberto
A1 Ariza Gracia, Miguel Ángel
A1 Carracedo Rodríguez, Juan Gonzalo
AB Objective: To characterize peculiarities of the corneoscleral geometry in healthy eyes.Methods: This is a prospective case series including 88 healthy eyes of 88 patients with an age ranging from 21 to 73 years. A complete ocular examination was performed with emphasis on the analysis of the corneoscleral topographic profile with the Fourier transform profilometer Eye Surface Profiler (Eaglet-Eye BV, Houten, the Netherlands). The distribution of different topographic parameters was evaluated, as well as the correlations between corneal and scleroconjunctival parameters.Results: Mean values of 8.64±0.37 (range, 7.81–9.50 mm), 6.06±0.52 (4.88–7.63 mm) and 11.93±1.32 mm (8.17–15.89 mm) were obtained for inner, limbal, and outer best-fit sphere, respectively. Mean values of 8.54±0.38 (7.86–9.66 mm) and 13.35±1.29 mm (11.05–17.31 mm) were obtained for mean corneal and scleral radius, respectively. Regarding tangent angles at limbus, mean values of 35.31±6.55°, 38.76±5.90°, 32.75±7.04°, and 25.91±8.99° were obtained for nasal, temporal, superior, and inferior angles, respectively. Mean difference between temporal and nasal sagittal heights increased from −1.48±120.70 μm for a chord of 11 mm to 73.53±236.55 μm for a chord of 14 mm. A weak but statistically significant correlation was found between corneal and scleral radii (r=0.325, P=0.004). The maximum sagittal height for a diameter of 12 mm was significantly correlated with flattest keratometry, astigmatism, corneal diameter, and corneal eccentricity (R2: 0.77, P<0.001).Conclusions: The scleroconjunctival surface in the healthy eye presents some level of nasotemporal asymmetry that is higher with increasing diameters of analysis.
PB Contact Lens Association of Ophthalmologists, Inc.
SN 1542-2321
YR 2019
FD 2019-05
LK https://hdl.handle.net/20.500.14352/13406
UL https://hdl.handle.net/20.500.14352/13406
LA eng
NO Accepted September 24, 2018
NO Ministerio de Economía, Industria y Competitividad de España
DS Docta Complutense
RD 2 may 2024