视轴与角膜曲率半径的关系

目的：探讨视轴与角膜曲率半径的关系。方法：采用A超测10491只眼的视轴（AL）值，用角膜曲率仪测出角膜前曲率半径（r)值，并将AL、r按视轴每相差1mm及其相应角膜曲率半径为一组分别进行统计分析。结果：视轴长者，曲率半径也相应长些，反之，视轴短者，其曲率半径也偏短，结论：随着视轴长度的逐渐增大，其角膜曲半径的值也相应逐渐增大。     

基于Pentacam的角膜后前表面曲率半径比值分布及其对角膜屈光力的影响

目的　分析年龄相关性白内障人群角膜后前表面曲率半径比值分布特点及其影响因素,探讨其与模拟角膜曲率和全角膜屈光力差值间的关系。方法　回顾性研究。选取2018年9月至2020年1月在天津市眼科医院白内障中心诊断为年龄相关性白内障患者317例317眼。术前应用Pentacam眼前节分析仪测量角膜后前表面曲率半径比值及眼前节相关参数,检查质量合格者纳入研究。运用线性相关及回归分析探讨角膜后前表面曲率半径比值与年龄、眼前节参数及角膜曲率差值ΔK（模拟角膜曲率-全角膜屈光力）的关系,并根据真实角膜后前表面曲率半径比值及厚透镜公式计算矫正角膜折射指数。结果　正常年龄相关性白内障人群角膜后前表面曲率半径比值为77.0%~86.0%［（81.59 ±1.69）%］,不同眼别及性别间差异均无统计学意义（P=0.376、0.232）。角膜后前表面曲率半径比值与角膜后表面半径（r_p=0.528,P<0.001）、角膜不规则散光（γ_s=0.151,P =0.007）、眼轴长度（r_s=0.149,P =0.010）均呈正相关,与角膜球差（γ_p=-0.271,P<0.001）、角膜中央厚度（γ_p=-0.218,P<0.001）、角膜后表面散光（γ_s=-0.164,P =0.003）均呈负相关,而与年龄、角膜前表面半径、前房深度、角膜前表面散光均无相关性（均为P>0.05)。角膜后前表面曲率半径比值越大,ΔK反而越小,说明模拟角膜曲率与全角膜屈光力的差异越小。矫正角膜折射指数值为1.325 0~1.330 5（1.327 8±0.000 1）。结论　正常年龄相关性白内障人群中角膜后前表面曲率半径比值存在偏离正常值情况,且与ΔK呈负相关。采用传统角膜折射指数计算角膜屈光力是不准确的,基于B/F Ratio得到的矫正角膜折射指数1.327 8更能反映真实角膜曲率。     

广东茂名白内障患者1097例构成特点及眼球参数分析

目的:测量白内障患者眼球生物学参数及构成比。方法:广东茂名1097例患者术前均检测眼压、眼轴、角膜曲率、角膜曲率半径、前房深度、晶状体厚度、玻璃体腔深度和记录晶状体混浊情况,应用SPSS15.0统计学软件进行统计分析。结果:白内障患者主要由60岁以上老人组成(90.88%),随着年龄增长,前房深度逐渐减小,垂直方向的角膜曲率变小,垂直方向的角膜曲率半径则变大,而眼轴则无明显改变;女性垂直和水平角膜曲率均大于男性,相应的角膜曲率半径则均小于男性;女性眼轴较男性短;女性晶状体厚度较男性小;女性玻璃体腔深度也较男性小;左眼的前房深度较右眼大。结论:广东茂名白内障患者主要由60岁以上患者组成,眼球参数随性别、年龄及眼别不同发生变化。     

正常眼轴白内障眼生物测量参数分析

目的 了解正常眼轴白内障人群眼球生物测量值分布及相关性.方法 回顾性分析研究.于2013～2015年在苏州大学第一附属医院眼科1839例（2129只眼）,22 mm≤眼轴＜26 mm的白内障患者的IOLMaster测量数据.结果 患者眼轴、前房深度、角膜曲率和角膜散光分别为（23.570.89） mm、（3.03±0.40） mm,（44.251.50）D和（0.960.65）D.男性患者眼轴、前房深度和角膜曲率半径大于女性（P＜0.001）.0.5 D＜角膜散光≤1.0 D有779只眼（36.59％）,角膜散光≥1.0 D有807只眼 （37.91％）,角膜散光≥2.0 D有142只眼（6.67％）.逆规散光有1017只眼（47.77％）,顺规散光有708只眼（33.26％）.角膜散光与年龄差异有统计学意义（r =0.18,P＜0.001）.随着年龄的增长,逆规散光所占比例逐渐增大.年龄和前房深度差异有统计学意义（r =-0.39,P＜0.001）,每10年前房深度变浅0.17 mm.眼轴与前房深度具有明显的直线关系差异有统计学意义（r=0.42,P＜0.001）;与角膜曲率差异有统计学意义（r=-0.49,P＜0.001）.结论 在正常眼轴白内障人群中,约3/5（62.09％）的眼散光≤1.0 D.角膜散光随着年龄的增长而增加,类型由顺规向逆规转变.前房深度随着年龄增长逐渐变浅;长眼轴伴随较深的前房深度和较平的角膜曲率.眼轴、前房深度和角膜曲率表现出性别差异.     

先天性白内障患者的眼生物测量数据分析

目的 了解先天性白内障患者的眼生物测量数据特征。设计 回顾性病例系列。研究对象 北京同仁医院2010-2018年小于18岁的先天性白内障患者117例。方法 回顾患者的病历资料。所有患者均接受了A超、角膜曲率计检查或IOL-Master 500检查。分析不同年龄（1~24个月组、25~72个月组及73~216个月组）、性别、单双眼先天性白内障患者以及单眼先天性白内障患者的白内障眼和对侧眼的眼生物测量数据差异。主要指标 眼轴长度、角膜曲率和角膜散光（K1-K2）。结果 117例先天性白内障患者平均眼轴长度、角膜曲率和角膜散光分别为（21.92±1.76）mm、（43.78±1.81）D和（2.03±1.10）D。1~24个月组、25~72个月组及73~216个月组先天性白内障患者的眼轴长度分别为（20.59±1.31）mm、（22.00±1.70）mm和（22.60±1.65）mm（F=11.99,P＜0.001）。不同年龄组患者的角膜曲率和角膜散光均无显著差异（F=0.330,P=0.720和F=0.625,P=0.537）。不同性别患者的眼轴长度和角膜曲率均无差异（t=-1.862,P=0.065和t=1.709,P=0.090）。单眼和双眼患者的眼轴长度和角膜曲率均无差异（t=1.272,P=0.206和t=-0.145,P=0.885）。单眼患者的白内障眼和对侧眼的眼轴长度和角膜曲率也无差异（t=-0.624,P=0.536和t=-0.201,P=0.842）,但白内障眼的角膜散光更大（2.05±1.00D、1.38±0.83D,P＜0.001）。结论 先天性白内障可能阻碍了角膜散光的生理性降低。先天性白内障患者2岁前眼轴长度增长较快,2岁后眼轴长度增长缓慢,这为先天性白内障患者人工晶状体植入合适时机的选择提供了参考。（眼科,2021,30： 36-41）     

1123例婴幼儿正常角膜横径的测量分析

测量正常婴幼儿角膜横径共1123例（2246只眼），用统计学的方法进行了统计分析。其结果：（1）婴幼儿角膜横径的平均值，男性为10．98mm（标准差±0．6）；女性为10．97mm（标准差±0．62）；男女总平均为10．98mm（标准差±0．62）。（2）角膜横径大小与性别、眼别均无差异（P＞0．05）。（3）婴幼儿角膜横径大小随年龄的增长而递增，在一年内增长最快，尤以6个月以内显著，1周岁至7周岁则缓慢递增。     

哈萨克族与汉族大学生正视眼生物学测量的对比分析

目的：：观察哈萨克族与汉族大学生正视眼的角膜中央厚度、前房深度、角膜前后表面曲率的差异性,并分析角膜厚度与角膜前、后曲率的相关性。方法：对新疆医科大学一年级500多名学生进行近视眼筛查,选取正视眼的汉族学生55名和哈萨克族学生51名,应用Sirius角膜地形图对其进行测量。结果：哈萨克族与汉族大学生角膜中央厚度(哈：0.52±0.03mm,汉：0.54±0.03mm )、前房深度(哈：2.97±0.31mm,汉：3.14±0.25mm)有显著性差异(P<0.05)。角膜前、后表面曲率(K1,K2)无显著性差异(P>0.05)。汉族的角膜厚度与角膜前曲率相关分析r<0,与角膜后曲率相关分析r<0.1。哈萨克族的角膜厚度与角膜前曲率相关分析r<0,与角膜后曲率相关分析r<0.1。结论：哈萨克族与汉族大学生正视眼的生物学测量指标中,角膜厚度、前房深度是有差异的。两个民族的角膜厚度与角膜前、后曲率(K1,K2)无相关性。     

Rose K硬性透气性角膜接触镜矫正完成期圆锥角膜屈光不正临床效果

目的总结Rose K硬性透气性角膜接触镜（Rose K RGPCL）矫正完成期圆锥角膜患者屈光不正的临床效果。方法回顾性病例研究。2011年2月至2012年5月,55例（59眼）完成期圆锥角膜患者在山东省眼科医院接受了Rose K RGPCL验配矫正,用角膜荧光染色法判断戴Rose K RGPCL 静态配适状态。对戴RGPCL前角膜地形图9 mm直径上0°、90°、180°、270° 4个点和锥顶角膜曲率值之间,裸眼视力（UCVA）、最佳眼镜矫正视力（BSCVA）和戴Rose K RGPCL 矫正视力之间,UCAV、BSCAV和戴Rose K RGPCL 3种状态下对比度视力之间,角膜平、陡、平均曲率半径及镜片基弧之间的差异采用方差分析进行比较。结果59眼角膜地形图周边4个点和锥顶角膜曲率两两比较,锥顶与周边4组差异均有统计学意义（P均<0.01）; 相同对比度下UCVA、BSCVA及戴Rose K RGPCL矫正视力两两比较差异均有统计学意义（P均<0.01）;镜片基弧与角膜平K、平均曲率半径两两比较差异均无统计学意义（P＞0.05）。结论完成期圆锥角膜患者验配Rose K RGPCL镜片能达到理想配适状态并获得较好的矫正视力及低对比度视力;验配过程中平坦曲率半径或平均曲率半径可以做为选择试戴片的基础。     

近视患者角膜横径与眼球其他参数的相关性分析

背景 近视患者角膜横径数据用途广泛,但其与眼球其他参数的相关性各研究结论不同.目的 探讨近视患者角膜横径与眼球其他参数的相关性. 方法 连续性纳入2012年2月至2013年2月在郑州大学第一附属医院眼科就诊的近视患者310例310眼,性别、年龄、等效球镜度、角膜地形图等数据.采用易俪统计学软件对资料进行处理,分析右眼角膜横径与性别、年龄、等效球镜度、角膜曲率、角膜散光、中央角膜厚度（CCT）和前房深度的关系. 结果 近视患者右眼角膜横径分布在10.8～ 13.5 mm,平均（11.7±3.8）mm.男女之间的角膜曲率和前房深度差异均有统计学意义（t=-1.574,P＜0.001;t=-1.145,P=0.034）.经平滑曲线拟合、阈值效应分析、单因素相关分析和多因素相关分析,角膜曲率与角膜横径为负向线性相关（β=-0.085,P=0.011）;前房深度与角膜横径为正向线性相关（β=0.722,P＜0.001）;角膜横径与近视等效球镜度、角膜散光、CCT和性别等参数均无相关性（β=0.000、0.084、-0.001、0.105,P＞0.05）,而年龄与角膜横径为存在拐点的曲线关系,且男女间的拐点不同. 结论 6 ～ 50岁近视患者的角膜横径与角膜曲率呈线性负相关,与前房深度呈线性正相关;角膜横径与性别、近视等效球镜度、角膜散光和CCT等参数无相关;与年龄存在拐点的曲线关系.     

角膜曲率对临界短眼轴人工晶状体度数差值影响

目的 分析角膜曲率与短眼轴临界两侧的人工晶状体度数差值的关系.方法 前瞻性研究.对2014年6月至2015年10月在河北医科大学第一医院眼科,①随机收集500只眼角膜正常的成人白内障患者的角膜曲率进行前瞻性研究,将相同角膜曲率合并,得到177组角膜曲率.②对177组角膜曲率求平均值,得到平均角膜曲率范围是：40.125～48.375 D.③在平均角膜曲率范围内,根据设定的临界眼轴长度（21.97～22.02 mm）进行计算,得到人工晶状体度数差值.④对人工晶状体度数差值与平均角膜曲率进行相关分析.结果 临界段短眼轴的人工晶状体度数差值与平均角膜曲率差异有统计学意义（r=-0.968,P=0.000）.结论 角膜正常的成人白内障患者中,短眼轴临界两侧值时,随着平均角膜曲率的增大,人工晶状体度数的差值逐渐变小.     

新疆维吾尔族40岁及以上白内障人群眼生物学参数的研究

目的了解新疆维吾尔族白内障人群眼生物学参数分布,比较男、女白内障人群眼生物学参数的差异。方法分析2017年1月~2019年10月在新疆爱尔阿迪娅眼科医院检查眼部的≥40岁维吾尔族白内障人群的26742眼,使用IOL Master进行眼轴长度、角膜平均曲率半径、前房深度及白对白距离测量,并进行统计学分析。结果首次获得新疆维吾尔族≥40岁白内障人群眼部生物学参数值:眼轴长度为(23.55±1.75)mm,角膜曲率半径为(7.77±0.29)mm,前房深度为(3.16±0.46)mm,白对白间距为(11.79±0.47)mm,并且男、女性别间差异均有统计学意义(眼轴长度:t=10.51,P<0.001;角膜曲率半径:t=30.81,P<0.001;前房深度:t=11.4,P<0.001;白对白间距:t=17.38,P<0.001)。结论新疆维吾尔族≥40岁白内障人群,眼轴长度较常值(24 mm)短,角膜曲率半径与正常值(7.8mm)持平,前房深度、白对白间距较正常值(2.5 mm,11.5mm)大,其中女性相对于男性眼轴较短、角膜平均曲率半径较小、前房深度较浅、白对白间距较短。     

Annulus of collagen fibrils in mouse cornea and structural matrix alterations in a murine-specific keratopathy

PURPOSE: Mouse corneas were investigated to see whether a limbal annulus of corneal collagen exists as in humans. Mice with corneas predisposed to topographical changes (the SKC strain) were also examined, to establish the size and spacing of stromal collagen fibrils and the integrity of the annulus. METHODS: X-ray diffraction was used to measure collagen fibril spacing and diameter in normal (the BALB/c strain; four male, two female) and SKC (six male and six female) corneas and to identify the degree of preferred collagen orientation at 200- microm intervals across two BALB/c and four SKC corneas. RESULTS: The average collagen fibril diameter measured 35.5 nm in 3-month-old BALB/c corneas, and 36.9 nm and 37.0 nm, respectively, in corneas of age-matched male and female SKC mice. In male and female SKC corneas, average collagen interfibrillar Bragg spacing was significantly higher (64.5 and 59.9 nm, respectively) than in corneas of BALB/c mice (49.7 nm). Circumferentially aligned collagen, indicative of a limbal annulus of fibrillar collagen 2.2 mm in diameter, was identified in mouse cornea. On occasion, this was disturbed in the SKC phenotype. CONCLUSIONS: Collagen fibrils are marginally larger in the corneas of SKC mice than in the corneas of BALB/c mice and are considerably more widely spaced. An annulus of fibrillar collagen probably exists near the limbus of the normal mouse cornea that may help promote biomechanical stability and maintain corneal shape. A loss of structural integrity in the annulus of some SKC mice may predispose the corneas to biomechanical instability and shape changes.     

Age-related paraxial schematic emmetropic eyes

Based on recent biometric data, four-surface paraxial schematic emmetropic eyes for different ages have been developed. There are three sets of schematic eyes: male, female and overall. With increase in age, the changes in the schematic eyes are decreased anterior chamber depth, increased lens thickness, decreased vitreous length, increased axial length, decreased anterior lens radius of curvature and increased lens equivalent refractive index. Gender differences are greater anterior corneal radii of curvature (0.07 mm), longer vitreous chambers (0.70 mm), longer axial length (0.70 mm) and lower lens equivalent refractive indices of male eyes (0.007) relative to female eyes. Gaussian parameters of the various schematic eyes are given.     

Central corneal thickness, radius of the corneal curvature and intraocular pressure in normal subjects using non-contact techniques: Reykjavik Eye Study

PURPOSE: To establish a population profile of central corneal thickness (CCT), radius of the corneal curvature (CC) and intraocular pressure (IOP) and the relationships between them using non-contact techniques. METHODS: We used a population-based random sample of 415 male and 510 female Caucasians aged 50 years and older. CCT and the radius of CC were measured with Scheimpflug anterior segment photography. IOP was measured with air-puff tonometry. RESULTS: The mean IOP of right eyes was 15.1 mmHg (SD 3.3) among men and 15.8 mmHg among women (SD 3.1), which is a statistically significant difference. The mean radius of CC for male right eyes was 7.78 (SD 0.60) and for females 7.62 (SD 0.58) which is also statistically significant. Mean CCT for male right eyes was 0.528 mm (SD 0.041) and for females 0.526 mm (SD 0.037), which is not a significant difference. Linear regression analysis shows no relationship between the radius of CC and IOP or between age and radius of CC. Linear regression analysis of the relationship between CCT and IOP suggests higher IOP measurements with thicker corneas. There was no significant correlation between age and CCT. CONCLUSION: IOP was found to be independent of age and significantly higher in females than in males. Radius of CC was found to be age-independent and significantly steeper in females than in males. CCT appears to be independent of age and gender. Greater CCT is associated with higher mean IOP.     

Two-year interval changes in Orbscan II topography in eyes with keratoconus

PURPOSE: To define topographic characteristics and quantitatively document changes in corneal topography parameters in relation to the progression of keratoconus over time using the Orbscan II topography system (Bausch & Lomb). SETTING: Eskisehir Osmangazi University Medical School, Department of Ophthalmology, Meselik, Eskisehir, Turkey. METHODS: This study comprised 79 eyes (79 patients) with keratoconus who had Orbscan II topography examinations at least twice with a mean interval of 24 months +/- 3.2 (SD). Topographic parameters including location radius, elevation compared to a best-fit sphere, pachymetry, mean tangential curvature, and mean spheric curvature were evaluated with special reference to the central point of the cornea, the apex, and the thinnest point. The change in each parameter was calculated using the paired t test. RESULTS: The mean patient age was 32.4 +/- 15.2 years. The increase in apex elevation (mean: 0.056 +/- 0.033 mm baseline versus 0.069 +/- 0.037 follow-up) (P<.02) and displacement of the location of the apex were statistically significant. The mean thinnest-point pachymetry decreased from 369 +/- 53 mum at baseline to 343 +/- 61 mum at follow-up (P = .03). The mean simulated keratometry minimum value was 48.21 +/- 5.5 diopters (D) and 54.09 +/- 6.2 D, respectively, a statistically significant increase (P = .02). The mean radius, mean elevation, mean tangential, and mean spheric curvatures of the apex did not change significantly. CONCLUSION: The Orbscan II topography system provided useful and detailed numerical information on keratoconic corneas and documented their progression quantitatively by serial topographic analysis.     

The effect of changing intraocular pressure on the corneal and scleral curvatures in the fresh porcine eye

AIM: To measure corneal and scleral radii of curvature in response to intraocular pressure (IOP). METHODS: Using digital photographic profile images of 16 fresh porcine eyes, the curvatures of the cornea and sclera were determined in response to five consecutive incremental 100 mul saline intravitreal injections. IOP was measured and ocular rigidity calculated. Elastic moduli of the cornea and sclera were estimated. RESULTS: Intraocular pressure and the radius of curvature of the sclera increased linearly with increasing volume. There was no statistical change in corneal curvature. The elasticity of the cornea and sclera was constant during the 15-50 mm Hg increase in IOP. The estimated range of the elastic moduli of the cornea and sclera were, respectively 0.07-0.29 MPa and 0.2 MPa to 0.5 MPa. The scleral rigidity ranged from 0.0017 to 0.0022. CONCLUSIONS: The elastic moduli of the cornea and sclera are independent of IOP. The modulus of elasticity of the sclera is higher than that of the cornea. Elevation of IOP changes the curvature of the sclera but not that of the cornea. Porcine scleral rigidity is similar to human scleral rigidity. Scleral curvature could be a novel method for measuring IOP.     

Assessing the sub-basal nerve plexus of the living healthy human cornea by in vivo confocal microscopy

The purpose of the study was to perform quantitative analysis of the sub-basal epithelial nerve plexus of healthy, living human cornea,using real time in vivo confocal microscopy and the analySIS software system. The study was based on in vivo confocalmicrostructural analysis of 50 eyes of 50 subjects, divided into two age groups: group 1 (n = 25)25 +/- 5 years of age, and group 2 (n = 25) 70 +/- 5 years of age. All subjects exhibited clinically healthy corneas. The overall nerve density was 632.35 +/- 287.57 microm/mm2 for group 1 and 582.39 +/- 327.13 microm/mm2 for group 2. The mean fibre dia-meter was measured at 0.52 +/- 0.23 microm for group 1 and at 0.56 +/- 0.27 microm for group 2. Beadings of the nerve fibres were recorded at a density of 213 +/- 123/mm for group 1 and 201 +/- 192/mm for group 2. Establishing standards for normal nerve density and morphology of the living human cornea at different ages may be beneficial, both in early detection and follow up of various corneal diseases and in post-surgical management following corneal surgery.     

Corneal parameters of six- to 12-year-old Chinese children

Purpose: The aim was to determine the corneal parameters in low to moderate myopic Chinese children and to investigate the differences in these corneal parameters between male and female subjects. Methods: Refractive errors and corneal parameters were retrieved from subjects who had participated in studies on myopia and astigmatism in 2008 and 2009. Corneal parameters including simulated K (Sim K) and asphericity (Q) at 9.0 mm chord and horizontal visible iris diameter (HVID) were determined for 217 children (112 males and 105 females aged from six to 12 years) using the Medmont E300 topographer. Results: The Q of the corneas was ‐0.44 ± 0.12 along the flat meridian and ‐0.22 (‐0.70 to 0.63) along the steep meridian. The HVID and Sim K of male subjects were larger and flatter than female subjects. The mean HVID of male and female subjects was 11.3 ± 0.3 mm and 11.1 ± 0.30 mm, respectively. The mean Sim K value in male and female subjects was 7.91 ± 0.24 mm and 7.79 ± 0.21 mm, respectively, along the flat meridian, and was 7.65 ± 0.26 mm and 7.53 ± 0.24 mm, respectively, along the steep meridian. Conclusions: All corneas were prolate elliptical in shape along the flat meridian and the peripheral flattening rate was found to be greater along the flat meridian. A greater flattening rate was observed in the corneas of Chinese children when compared to that of Caucasian children. The Q between male and female subjects was not significantly different. Male subjects tended to have larger HVID and flatter corneas than female subjects.     

Objective screening methods for prior refractive surgery in donor tissue

PURPOSE: Laser refractive surgery presents a growing contamination of the available corneal donor pool. There currently is no objective method for screening donor tissue for previous refractive surgery. We evaluated the usefulness of pachymetry and curvature maps in the screening of donor corneas. METHODS: Pachymetry and curvature maps were generated from the Orbscan for 40 normal donor eyes. The average central pachymetry measurement was subtracted from the thinnest average midperipheral pachymetry measurement for each map to generate a normal range of pachymetry measurements. For curvature, the average curvature at the 3-mm zone was subtracted from the average curvature at the 7-mm zone to generate a normal range of corneal curvature. The pachymetry and curvature results from 10 donor eyes that had undergone refractive surgery were then compared with the normal range for each technique. RESULTS: The average difference in pachymetry measurements between the midperipheral and central cornea for normal eyes was 0.040 +/- 0.026 mm. Four of 10 corneas that had undergone refractive surgery were outside two standard deviations of this normal range. The average difference in corneal curvature between the 7-mm zone and the 3-mm zone for the healthy eyes was -0.2 +/- 1.0 diopters. Four (40%) of 10 corneas that had undergone refractive surgery were identified with this method. When combined, the pachymetry and curvature methods detected seven (70%) of 10 corneas that had undergone refractive surgery. CONCLUSION: Regional differences in thickness and curvature in donor eyes may provide methods for screening for refractive surgery for myopia. Refinement in mathematical manipulations may further improve the sensitivity of these techniques.     

Evaluation of the White-to-White Distance in 39,986 Chinese Cataractous Eyes

PurposeTo investigate the distribution of white-to-white (WTW) distance and its associations with other biometric parameters in Chinese cataractous eyes.MethodsData on 39,986 eyes from 23,627 Chinese cataract patients were analyzed. Ocular biometric parameters, including WTW distance, corneal curvature, anterior chamber depth (ACD), lens thickness (LT), central corneal thickness (CCT), and axial length (AL), were obtained using the ZEISS IOLMaster 700.ResultsThe mean age of patients was 63.7 ± 12.4 years, and 57.61% were female. The mean WTW distance was 11.69 ± 0.46 mm. The WTW distance was larger in male patients than in female patients for all age groups (all P < 0.001). The WTW distance was positively correlated with corneal curvature and ACD and negatively correlated with age, LT, and CCT (all P < 0.001). Multivariable analysis revealed that a larger WTW distance was associated with younger age; male gender; larger corneal curvature, ACD, and LT; and thinner CCT (all P < 0.001). Notably, the association between WTW distance and AL was not linear. As the AL increased, the WTW distance initially increased, reached a peak in the group with ALs of 24.5 to 26 mm, and then slowly decreased. However, all of the myopic eyes (AL > 24.5 mm) still had larger WTWs than the normal and short eyes (AL ≤ 24.5 mm).ConclusionsIn Chinese cataractous eyes, the WTW distance was larger in younger male patients with flatter corneas, deeper anterior chambers, thicker lenses, and thinner central corneas. The association between WTW distance and AL was not linear, and WTW distance was the largest in eyes with ALs of 24.5 to 26 mm.