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目的分析成年近视眼人群角膜Q值的分布情况及其与年龄、性别、眼别、屈光度的关系。设计前瞻性病例系列。研究对象连续的成年人近视眼510例(1020眼)。方法应用OrbscanⅡz跟前节分析系统检测近视眼病例的角膜Q值。对Q值行正态分布检验,并做眼别间、性别间比较,对球镜屈光度、柱镜屈光度、年龄与Q值之间进行相关分析。主要指标角膜Q值,相关系数。结果成年近视眼1020眼角膜Q值平均-0.270±.16(范围-0.86～0.25),近似正态分布。右眼与左眼间比较差异无统计学意义(P=0.675)。角膜Q值男性(-0.26±0.15)与女性(-0.27±0.17)间比较差异无统计学意义(P=0.697)。角膜Q值与球镜屈光度、柱镜屈光度无相关性(r=0.057,0.044;P=0.068,0.156)。20岁以下组角膜Q值平均为-0.24,负值较小;40岁以上组为-0.36,负值较大,与其他组比较差异有统计学意义(P均=0.000)。结论成年近视眼人群的角膜Q值随年龄增长有逐渐向负值飘移的倾向,尤其40岁以后更明显。角膜Q值与眼别、性别、屈光度无关,但高度个性化。
Objective To analyze the distribution of corneal Q value in adult myopic eyes and its relationship with age, sex, eye size and refraction. Design prospective case series. 510 consecutive adult myopic eyes (1020 eyes) were included in the study. Methods Orbscan Ⅱ z with the previous section of the analysis system for detecting corneal Q value of myopia cases. Q value of the line normal distribution test, and do eyes, sex comparison, spherical refraction, lenticular diopter, age and Q value correlation analysis. The main indicators of corneal Q value, correlation coefficient. Results The corneal Q value of 1020 eyes of adult myopia average -0.270 ± .16 (range -0.86 ~ 0.25), approximately normal distribution. There was no significant difference between right eye and left eye (P = 0.675). There was no significant difference in corneal Q value between male (-0.26 ± 0.15) and female (-0.27 ± 0.17) (P = 0.697). There was no correlation between corneal Q value and spherical refraction and cylinder refraction (r = 0.057,0.044; P = 0.068,0.156). The Q value of cornea in the group under 20 years old was -0.24 on average, with a small negative value; the group over 40 years old was -0.36, the negative value was larger, and the difference was statistically significant compared with other groups (P = 0.000). Conclusion The corneal Q value of adult myopia tends to drift to negative gradually with age, especially after the age of 40. Corneal Q value and eyes do not, gender, refractive unrelated, but highly personalized.