Title: Investigating and analysis the corneal diameter in myopia population for laser refractive surgery
Abstract: Objective To determine whether AstraMax topography system detects the difference in corneal diameter between the genders,between right and left eyes,and the correlation between diopter and corneal diameter.Methods Corneal diameters were measured with AstraMax topography system in 220 right eyes and 220 left eyes of 220 healthy subjects aged between 17 to 41 years.There were 102 female subjects and 118 male subjects.Each measurement was repeated three times.Results The average corneal diameter was (12.00±0.40) mm.The average corneal diameter was (12.12±0.36) mm in males compared with (11.86±0.40) mm in females;(12.02±0.40) mm in right eyes and (11.99±0.41) mm in left eyes.Corneal diameters classified with refractive error were 12.15 mm,12.00 mm and 11.91 mm respectively for low,moderate and high myopia.Differences in gender were significant in the t test for independent samples(P=0.000).There were no statistically significant differences between right and left eyes in the t test for dependent samples(P=0.503).There were statistically significant differences for corneal diameters classified with refractive error.The corneal diameter was negatively correlated with the refractive error.Corneal diameters decreased with refractive error diopters.The higher the refractive error,the less the corneal diameter.Conclusion AstraMax topography system provide us a precise information of corneal diameter,the corneal diameter was significantly greater in males than in females,corneal diameters decreased with refractive error diopters.It is important to choose the operative style before the refractive surgery.With the obtained normal values,more precise determination of microcornea and macrocornea will be possible in the future.
Publication Year: 2006
Publication Date: 2006-01-01
Language: en
Type: article
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