目的 探讨睫毛蠕形螨感染与睑板腺功能障碍(meibomian gland dysfunction,MGD)发生的相关性,并分析睫毛蠕形螨感染对MGD患者眼表症状跟体征的影响。方法 前瞻性队列研究。选取2018年7月—2019年3月在广州市第一人民医院眼科门诊诊断为MGD患者47例,按照年龄将MGD患者分别纳入MGD＜40岁组(A₁组,28例)和MGD＞60岁组(B₁组,19例)。根据蠕形螨检测结果将MGD患者分别纳入蠕形螨检出阳性组(Ⅰ组,22例)与蠕形螨检出阴性组(Ⅱ组,25例)。同时,选取无MGD正常人或仅患屈光不正、玻璃体混浊的患者共49例,按照年龄将其分别纳入NMGD＜40岁组(A₂组,30例)和NMGD＞60岁组(B₂组,19例)。主要统计受试者眼部症状(眼痒、眼痛、眼干、异物感、视物模糊)发生率、睫毛蠕形螨检出数量及检出率、睑板腺排出能力评分、睑板腺分泌物性状评分及眼表疾病指数(Ocular Surface Disease Index,OSDI)。结果 MGD＜40岁组(A₁组)与NMGD＜40岁组(A₂组)睫毛蠕形螨检出数量分别为(1.14±1.938)、(0.17±0.531)只,差异有统计学意义(P=0.003,＜0.05),睫毛蠕形螨检出阳性率分别为43%、10%,差异有统计学意义(P=0.006,＜0.05);MGD＞60岁组(B₁组)与NMGD＞60岁组(B₂组)睫毛蠕形螨检出数量分别为(1.89±2.331)、(0.68±1.529)只,差异没有统计学意义(P＞0.05),睫毛蠕形螨检出阳性率分别为53%、21%,差异没有统计学意义(P＞0.05); MGD患者睫毛蠕形螨检出阳性组(Ⅰ组)与MGD患者睫毛蠕形螨检出阴性组(Ⅱ组)睑板腺分泌物性状评分分别为(3.00±1.11)、(2.28±1.28),差异有统计学意义(P＝0.047,＜0.05);Ⅰ组OSDI、睑板腺排出能力评分、眼干、眼痛、眼痒、异物感以及视物模糊发生率与Ⅱ组相比,差异均不具有统计学意义(P＞0.05);MGD组文化水平与NMGD组相比,差异没有统计学意义(P=0.382,＞0.05)。结论 首先,在40岁以下人群中,睫毛蠕形螨与MGD形成有一定相关性;而在60岁以上人群中,相较于其他影响因素,睫毛蠕形螨对MGD形成的作用并不显著,表明睫毛蠕形螨对MGD形成的影响主要体现在中青年时期,且随着年龄增长,二者之间的关联性进一步降低。另外,睫毛蠕形螨感染与MGD患者发生眼痛、眼干、眼痒、异物感以及视物模糊这些眼部症状和睑板腺分泌功能受损没有相关性。

Objective To investigate the correlation between eyelash Demodex infection and meibomian gland dysfunction (MGD) and to analyze the effect of eyelash Demodex infection on ocular surface symptoms and signs in patients with MGD. Methods Prospective cohort study. 47 patients with MGD diagnosed in the ophthalmology clinic of Guangzhou First People's Hospital from July 2018 to March 2019 were selected. The MGD patients were assigned to the MGD＜40 years old group (A₁ group, n=28) and MGD＞60 years old Group (B₁ group, n=19) according to the age. According to the Demodex test results, MGD patients were assigned to the Demodex-positive group (I group, n=22) and the Demodex-negative group (II group, n=25). At the same time, 49 patients without MGD or only with ametropia and vitreous opacity were selected and assigned to the NMGD＜40 years old group (A₂ group, n=30) and NMGD＞60 years old group (B₂ group, n=19) according to their age. The incidence of ocular symptoms (itchiness, pain, dryness, foreign body perception, and blurred vision), the number and rate of detection of eyelash Demodex, meibomian gland ejection score, meibomian gland secretion score, and Ocular Surface Disease Index (OSDI) were analyzed. Results The number of eyelash Demodex was (1.14±1.938) in MGD＜40 years old group (A₁ group) and (0.17±0.531) in NMGD＜40 years old group (A₂ group). The difference in the number of eyelash Demodex between these two groups was found to be statistically significant (P=0.003,＜0.05). The positive rate of eyelash Demodex was 43 % in MGD＜40 years old group (A1 group) and 10% in NMGD＜40 years old group (A₂ group). The difference in the positive rate of eyelash Demodex between these two groups was found to be statistically significant (P=0.006,＜0.05). The number of eyelash Demodex in MGD＞60 years old group (B₁ group) was (1.89±2.331) and in NMGD＞60 years old group (B₂ group) was (0.68±1.529). The difference in the number of eyelash Demodex between these two groups was not statistically significant(P>0.05). The positive rate of eyelash Demodex was 53 % in MGD＞60 years old group (A₁ group) and 21% in NMGD＞60 years old group (A₂ group). The difference in the positive rate of eyelash Demodex between these two groups was not statistically significant (P>0.05). The score of the meibomian gland secretion in the MGD with eyelash Demodex group (I Group) was (3.00±1.11) and in the MGD without eyelash Demodex group (II group) was (2.28±1.28). The difference in the score of the meibomian gland secretion between these two groups was found to be statistically significant (P=0.047<0.05). The differences of the OSDI score, the meibomian gland discharge ability score, the incidence rate of dry eye, eye pain, eye itching, foreign body sensation and blurred vision between these two groups were not statistically significant (P>0.05). The difference in the culture level between the MGD group and the NMGD group was not statistically significant (P=0.382, >0.05). Conclusion First, in the population under 40 years old, eyelash Demodex is correlated with MGD. Then in the population over 60 years old, the effect of eyelash Demodex on the formation of MGD compared with other influencing factors is not significant. The results indicated that the effect of eyelash Demodex was mainly reflected in the middle and young age, and the correlation between them was further reduced with the increase of age. In addition, in MGD patients, eyelash Demodex infection was not significantly correlated with the incidence of eye pain, eye dryness, eye itching, foreign body sensation, and blurred vision, as well as the degree of impairment of meibomian gland secretion function.

目的 探讨A超和IOL Master测量人工晶状体度数的精确性,为白内障手术提供客观的临床数据。方法 选取300例300眼老年性白内障患者,术前采用A 超和IOL Master测量眼轴长度、自动验光仪测量角膜曲率,A超组利用自动验光仪的角膜曲率数据,IOL Master组利用仪器自带的角膜曲率数据,均使用SRK-T公式计算需要植入的人工晶状体度数,观察术后3 m的屈光状态,使用自动验光仪检测患者屈光状态并分析。结果 所有被列入研究的患眼随机分为A超组和IOL Master组, A超组测得的平均眼轴长度为(23.21±0.59)mm,IOL Master组测得的眼轴长度为(23.22±0.59)mm,两组数据对比差异无统计学意义(P>0.05);利用自动验光仪测量的术前平均角膜曲率为(44.01±1.79)D,利用IOL Master测量的术前平均角膜曲率为(44.13±1.62)D,两者比较差异无统计学意义(P＞0.05);A超组和IOL Master组术后的平均绝对屈光误差(mean absolute refractive error,MAE)分别为(0.43±0.26)D、(0.42±0.17)D,两组比较差异无统计学意义(P>0.05)。结论 IOL Master在操作上略优于A超,但在人工晶体度数测量上与A超比较没有发现明显优势,不能完全取代A超,两者结合更能确保人工晶体度数测量的精确性。

Objective By discussing the accuracy of A-scan and IOL Master in intraocular lens power measurement, to offer Objective clinical data for cataract surgery.Methods Three hundred patients(300 eyes)with age-related cataract were included in the study. Before surgery,axial length was measured by A-scan and IOL Master respectively and corneal curvature was measured by auto refractometer. A-scan group used the corneal curvature data of the auto refractometer. IOL Master group used the corneal curvature data from the instrument. Intraocular lens power was calculated according to the SRK-T formula.We observed the refractive state of 3m after operation, detected and analyzed the patient's refractive data by the auto refractometer.Results All patients who were included in the study were randomly divided into A-scan group and IOL Master group.The mean axial length was (23.21±0.59) mm measured by A-scan, the mean axial length was (23.22±0.59) mm measured by IOL Master. There was no significant difference between them (P>0.05). The preoperative mean corneal curvature measured by the auto refractometer was (44.01±1.79)D. The preoperative mean corneal curvature measured by IOL Master was (44.13±1.62)D. There was no statistically significant difference between them (P＞0.05). The mean absolute refractive error ( MAE) in A－scan group was (0.43±0.26)D and in IOL Master group was (0.42±0.17)D. There was no statistically significant difference between them (P＞0. 05).Conclusion IOL Master group operated slightly better than A-scan group, but we did not find a significant advantage in intraocular lens power measurement with A-scan group. IOL Master may not completely replace A-scan. The combination of the two ensures the accuracy of the measurement in intraocular lens power.

目的 探讨Sirius与A超对不同程度近视患者中央角膜厚度(CCT)的测量差异。方法 对225例(450眼)拟行角膜屈光手术的近视患者,按低、中、高度近视分三组,依次用Sirius和A超测量CCT。 测量结果行配对t检验、 Pearson相关及 Bland-Altman分析。结果 低、中、高度近视组中,Sirius所测CCT均数分别为(542.61±29.19)μm、(543.96±27.02)μm、(547.25±22.53)μm;A超CCT均数分别为(538.51±29.12)μm、(540.98±26.56)μm、(542.19±21.64)μm。不同近视组中,Sirius测量值均略大于A超值,且两者高度正相关,差异有统计学意义(P<0.05)。Bland-Altman分析,不同近视组中,两种仪器测量CCT的一致性较好。结论 Sirius在绝大多数情况下能够替代传统的A超角膜测厚仪,但对拟行激光手术的高度近视患者应该综合考虑两种仪器测量结果。

Objective To study the measurement differences of central corneal thickness(CCT) in different degree of myopia by Sirius and ultrasound pachymetry(UP). Methods 225 myopic subjects(450 eyes)were recruited and divided into three groups according to the degree of refractive errors. The CCT were obtained from the eyes for each subjects using the Sirius and UP. Data were compared by using paired t-tests and the Pearson correlations. Bland- Altman analysis of all pairs were determined. Results The mean CCT in low myopic group obtained from Sirius and UP were (542.61±29.19)μm and(538.51±29.12)μm,respectively. The mean CCT in medium myopic group by Sirius and UP were(543.96±27.02)μm and(540.98±26.56)μm.The measured mean CCT in high myopic group were(547.25±22.53)μm and(542.19±21.64)μm by Sirius and UP. The mean CCT measurements between the two instruments were high correlated and statistically different(P<0.05) in the three groups respectively. In different myopia groups Sirius has good coincidence with UP in measuring CCT according to the Bland-Altman plot. Conclusion In vast majority of cases,Sirius can replace traditional UP in measuring CCT. But for the preopreative examination of the high myopia patients, we need to think twice about the difference between the two measurements.