Clinical analysis of corneal topography in adolescent myopia patients

Objective:To reveal the topography characteristics for corneal morphology and to figure out the rules of distribution for corneal refraction.Methods:463 eyes of 236 adolescent myopia patients were evaluated using computer assisted videokeratography (Topcon KR-7100P Japan).Results:14.47% of corneal topography areas were round, 7.56% were oval, and 3.46% were irregular, 345 eyes had a bow tie pattern (73.92%). A t test did not reveal any significant differences in corneal refraction, corneal thickness, eye axis and IOP among the four patterns. There were significant differences in vertical K, corneal astigmatism, or total astigmatism when bow tie and round patterns were compared using a t test.Conclusion:The morphology in corneal topography had no correlation to corneal refraction, corneal diameter, corneal thickness or IOP. When astigmatism exists, corneal topography may have a bow tie pattern, and the axis of this pattern corresponds to the axis of with the rule astigmatism and against the rule astigmatism.