Li Hai-wu, Guo Hai-ke, Zhang Hong-yang, Liu Mei-ying
Department of Ophthalmology, Guangdong Province Hospital of Integrated Traditional and Western Medicine, Foshan 528200, China.
Zhonghua Yan Ke Za Zhi. 2010 Apr;46(4):337-41.
To investigate the distribution of corneal Q-value in the age-related cataract patients and aspherical features of cornea before and after the phacoemulsification (PHACO).
Thirty-nine eyes of 30 age-related cataract patients in our department were included. Transparent cornea incision at the temporal cornea was applied for patients with cornea astigmatism < 1.00 D and transparent cornea incision at the maximum curvature meridian for patients with cornea astigmatism > or = 1.00 D in PHACO. All patients were followed up to 3 months, corneal Q-value, corneal curvature, astigmatism were examined before and after PHACO, distribution of corneal Q-value and their correlation factors were analyzed.
The mean corneal Q-value before and after the PHACO was -0.07 +/- 0.22 and -0.11 +/- 0.16, respectively. There was no statistical difference between the corneal Q-values before and after surgery (t = 1.14, P = 0.26). The mean of corneal curvature before and after the PHACO was (44.6 +/- 1.92) D and (44.70 +/- 1.47) D, respectively. There was no statistical difference between corneal curvature before and after the operation (t = -0.69, P = 0.50). The corneal Q-value was negatively co-related with corneal curvature before the surgery (r = -0.46, P = 0.003). The mean astigmatism power before and after the HACO was (0.67 +/- 0.43) D and (0.66 +/- 0.42) D, respectively. There was no statistical difference between astigmatism power before and after the surgery (t = -0.24, P = 0.82). There was no relationship between the corneal Q-value and astigmatism power before surgery (r = -0.24, P = 0.14).
The corneal Q-value of aged patients is in normal distribution, is negative in the majority, and showed a negative relationship with corneal curvature. There is no statistical difference between the corneal Q-value, corneal curvature, and astigmatism power before and after PHACO surgery.
探讨年龄相关性白内障患者角膜Q值的分布情况以及白内障超声乳化吸除术（PHACO）前后角膜的非球面特征。
纳入我院眼科30例年龄相关性白内障患者的39只眼。角膜散光<1.00 D的患者行颞侧透明角膜切口，角膜散光≥1.00 D的患者行最大曲率子午线方向透明角膜切口。所有患者随访3个月，分别于PHACO术前、术后测量角膜Q值、角膜曲率、散光，分析角膜Q值的分布及其相关因素。
PHACO术前、术后角膜平均Q值分别为-0.07±0.22和-0.11±0.16，手术前后角膜Q值差异无统计学意义（t = 1.14，P = 0.26）。PHACO术前、术后角膜平均曲率分别为（44.6±1.92）D和（44.70±1.47）D，手术前后角膜曲率差异无统计学意义（t = -0.69，P = 0.50）。术前角膜Q值与角膜曲率呈负相关（r = -0.46，P = 0.003）。HACO术前、术后平均散光度数分别为（0.67±0.43）D和（0.66±0.42）D，手术前后散光度数差异无统计学意义（t = -0.24，P = 0.82）。术前角膜Q值与散光度数无相关性（r = -0.24，P = 0.14）。
老年患者角膜Q值呈正态分布，多数为负值，且与角膜曲率呈负相关。PHACO手术前后角膜Q值、角膜曲率及散光度数差异均无统计学意义。
