近视眼准分子激光原位角膜磨镶术后角膜厚度与眼压关系的相关分析

目的探讨近视眼准分子激光原位角膜磨镶术（LASIK）术后1、3、6、12个月中央角膜厚度（CCT）与眼压的关系。方法行LASIK术89例（89只眼）。按LASIK术后时间分为术后1、3、6、12个月4组。采用非接触压平式眼压计（CANON TX-F,NCT）测量术前及术后不同时间眼压,用TPMEY SP-3000测量术前及术后不同时间CCT。LASIK术前、术后不同时间眼压及LASIK术前、术后不同时间CCT行重复测量设计方差分析。LASIK术前及术后不同时间CCT与眼压的关系行双变量直线回归分析。结果 CCT与眼压呈正相关关系。相关系数r=0.472,P〈0.001。LASIK术后CCT平均减少80.56μm,眼压平均减少5.61 mm Hg。术后1~6个月CCT增加13.10μm。眼压增加0.58 mm Hg。结论 LASIK术前、术后不同时间CCT与眼压呈正相关关系。术后1~6个月CCT逐渐轻度增加、眼压相应增高。6~12个月CCT未再增加。     

维吾尔族与汉族近视患者中央角膜厚度的研究

目的:分析维吾尔族与汉族近视患者中央角膜厚度(central corneal thickness,CCT)是否存在差异,了解维吾尔族近视患者中央角膜厚度与角膜曲率、眼压值及屈光度关系。方法:对屈光中心就诊近视患者汉族137例274眼及维吾尔族患者115例230眼测量其角膜中央厚度、眼压、屈光度及角膜曲率,分析维吾尔族与汉族CCT差异性及维吾尔族CCT与角膜曲率、眼压值及屈光度关系。结果:维吾尔族CCT(514.94±31.94μm)与汉族CCT(514.86±29.50μm)无显著性差异(t=0.029,P=0.977)。维吾尔族近视患者CCT与眼压间差异有统计学意义(r=0.4944,P<0.01)。维吾尔族近视患者CCT与角膜曲率及屈光度间差异无统计学意义(r=0.093,P>0.05;r=0.120,P>0.05)。结论:维吾尔族与汉族CCT无显著性差异,维吾尔族近视患者角膜厚度与眼压间存在相关性,而与角膜曲率及屈光度无相关性。     

角膜中央厚度和角膜曲率对青少年眼压的影响

目的 探讨角膜中央厚度和角膜曲率对青少年眼压的影响。方法 观察74例148眼门诊青少年患者的非接触式眼压计(non—contact tonometer，NCT)测量值、角膜中央厚度(central corneal thickness，CCT)和角膜曲率，其中37例74眼为高眼压组，37例74眼为正常眼压组。结果 CCT在高眼压组为(588．63土30．58)μm，对照组为(558．40土27．60)μm，2组均与眼压呈正相关，p＜0．05，差异有显著。CCT在2组间差异不显著(p＞0．05)。角膜曲率与高眼压组和正常对照组NCT测量值之间差异不显著(p＞0．05)。结论 CCT与青少年NCT测量值呈正相关，中央角膜厚度值越大，眼压越偏高。2组间CCT差异不明显，表明CCT并不是影响眼压的唯一因素。     

近视眼角膜厚度与眼压相关因素分析

目的 探讨近视眼角膜中央厚度(CCT)、屈光度、角膜曲率、年龄、性别与眼压(IOP)测量值之间的关系.方法 对219例431只眼用超声角膜测厚仪、Goldmann眼压计、检影镜及电脑验光仪和ObscanⅡ角膜地形图分别测量其数据.结果 近视眼患者CCT与IOP之间具有直线正相关性,CCT每增加10μm,眼压值约增加0.5 mmHg(1 mmHg=0.133 kPa).近视患者CCT与屈光度数具有负相关性.近视患者CCT与角膜曲率、年龄及性别不相关.结论 CCT为影响IOP测量的一个重要因素,检查CCT有助于更好的了解真实IOP值;CCT随近视眼患者屈光度数的增加有变薄的趋势.     

LASIK术前眼压、中央角膜厚度、屈光度和曲率相关性分析

目的：探讨LASIK术前屈光不正患者眼压（intraocular pressure,IOP）、中央角膜厚度（central corneal thickness,CCT）、屈光度和角膜曲率之间的关系。方法：屈光不正患者220例440眼,用非接触式眼压计测量患者的眼压、超声角膜测厚仪测量患者中央角膜厚度、电脑验光仪测量等效球镜度数和曲率,两两比较各测量项目之间的相互关系,并进行统计学处理。结果：各组屈光不正患者眼压与中央角膜厚度之间呈正相关关系（r=0.568, 0.534, 0.413, 0.412;P＜0.001）。屈光不正患者屈光度与中央角膜厚度、曲率、眼压之间相关性无统计学意义（r=-0.078,0.068,-0.077;P=0052, 0.073,0.058）。屈光不正患者曲率与眼压、中央角膜厚度之间比较差异无统计学意义（r=0.004,-0.058;P=0.917,0.157）。结论：屈光不正患者眼压与中央角膜厚度之间呈正相关,随着角膜厚度的增加眼压升高。     

Pascal动态轮廓眼压计在角膜屈光手术前后的应用

目的 探讨Pascal动态轮廓眼压计(dynamic contour tonometer,DCT)在角膜屈光手术前后的应用.方法 随机收集我院2009年1月至6月拟接受角膜屈光手术的屈光不正患者127例(254眼),其中男51例(102眼),女76例(152眼);年龄18～47岁,平均(22.48±3.57)岁.中央角膜厚度(central corneal thickness,CCT)为450～600 μm,平均等效球镜度数为-0.75～10.00 D.术前及术后1个月分别采用DCT和非接触式眼压计(non-contact tonometer,NCT)测量眼压,角膜超声测厚仪测量CCT,并分析眼压与CCT变化的关系.结果 术前:450 μmm550 μm时,NCT测得眼压平均值分别为(11.51±3.25)mmHg(1kPa=7.5 mmHg)、(17.58±2.97)彻Hg、(19.74±3.12)nHg,DCT测得眼压平均值分别为(16.89±2.56)mmHg、(17.33±3.32)mmHg、(17.58±2.74)mmHg,当450 μm550 μm时,DCT与NCT测得的眼压平均值比较,差异均有统计学意义(均为PO.05);术后1个月:当△CCT≤50 μm、50μm<△ccT≤100μm和△cCT>looμm时,NCT测得眼压较术前分别下降(1.46±0.81)mmHg、(3.87±1.21)mmHg、(4.19±2.68)mmHg,与术前相比差异均有统计学意义(P<0.05、P0.05).结论 DCT受角膜厚度影响较小,是角膜屈光手术前后眼压测量的一种好方法,尤其对于手术前眼压偏高的患者意义更大.     

学龄前儿童眼球生物学参数与屈光状态的相关性分析

目的 了解学龄前儿童(3～6岁)眼球生物学参数特性与屈光状态的相关性。方法 收集2021年3月至2021年12月3～6岁学龄前儿童387例(774眼)。睫状肌麻痹散瞳后验光记录等效球镜度(SE)。眼部光学生物测量仪测量眼轴长度(AL)、中央角膜厚度(CCT)、前房深度(ACD)、角膜曲率(K),计算轴率比(AL/CR)。对结果进行统计学分析。结果 3～6岁儿童屈光状态越向近视化发展,相对CCT越薄,ACD更深,K增高,AL增长,AL/CR增高。AL、AL/CR与SE之间存在显著负相关,AL/CR可以解释75.4%的SE的方差。年龄与AL/CR、AL之间存在正相关性,而与K无显著相关性。AL/CR诊断近视的ROC曲线下面积为0.941,比单用AL的诊断近视效率更高。结论 眼轴和轴率比是反映学龄前儿童屈光状态的主要因素。年龄是影响其两者的显著性因素,且与眼轴的关系更密切,年龄越大,眼轴越长。轴率比可更好的预测正视化进展和预估近视倾向。     

动态轮廓眼压计与非接触式眼压计的比较

目的探讨中央角膜厚度和角膜曲率对轮廓动态眼压计以及非接触式眼压计眼压测量结果的影响。方法接受准分子激光原位角膜磨镶术(LASIK)的近视患者27例(54只眼),分别于术前和术后第4周使用非接触式眼压计(NCT)和动态轮廓眼压计(DCT)进行眼压测量。多元线性相关分析研究NCT、DCT测量值和角膜曲率及角膜中央厚度(CCT)之间的相关性。结果LASIK术后NCT测量值降低,而DCT测量值和术前比较差异则无统计学意义。角膜曲率、CCT和NCT读数呈线性相关,而与DCT读数无关。结论DCT测量眼压不受角膜曲率和中央角膜厚度影响,因此更适合于正常眼以及曾经接受角膜屈光手术眼的眼压测量。     

相干光生物测量法在儿童眼球测量中应用

目的 探讨相干光生物测量法在儿童眼球生物测量中的重复性和准确性,评价该方法在儿童中的应用价值.方法 用ZeissIOL-Master3.02相干光生物测量仪(PCI)、QMC5.03接触式A型超声生物测量仪(A超)和TopconKR-8800角膜曲率计分别测量小儿眼科门诊患者126例244只眼的眼球轴长(Ax)、前房深度(ACD)和角膜曲率(K值).其中男51例,女75例,平均年龄(10.7±2.9)岁(3～16岁).全部患者排除眼部器质性病变,检查静态屈光.结果 PCI和A超测量的Ax的变异系数(COV)分别为0.67%和0.72%,PCI测量的Ax和ACD分别比A超测量值大(0.22±0.22)mm和(0.10±0.20)mm,差异均有统计学意义,P<0.05.PCI与A超测量结果显著相关,相关系数分别为0.98(Ax)和0.64(ACD),P<0.05.PCI与曲率计测量的K值相比,差别为0.04D,无统计学意义,P>0.05.结论 PCI测量儿童眼球生物参数稳定可靠,与A超的测量结果高度相关,可重复性高于A超.PCI测量的K值与曲率计测量结果无差异.PCI可以替代A超和曲率计,有望成为儿童眼球生物测量的常规方法.     

三种光学测量仪器与A超对近视眼中央角膜厚度测量的对比研究

目的:探讨眼前段光学相干断层扫描仪(Visante OCT)、裂隙灯型眼前段光学相干断层扫描仪(SL-OCT)、OrbscanⅡz角膜地形图/角膜测厚系统(OrbscanⅡz)和A型超声测量仪测量近视人群中央角膜厚度(central corneal thickness,CCT)的差异及相关性,以评价三种光学测量仪器在测量中央角膜厚度的准确性,为其临床应用提供依据。方法:对近视患者43例86眼分别用Visante OCT、SLOCT、OrbscanⅡz和A型超声测量仪进行CCT的测量,并对四种仪器测量的CCT值采用单因素方差分析,LSD-t法两两比较,Pearson相关分析。结果:Visante OCT、SL-OCT、OrbscanⅡz和A型超声测量仪测量CCT的平均值分别为(521.05±29.88)μm、(533.73±31.83)μm、(534.02±32.96)μm、(540.60±31.11)μm,95%可信区间分别为(514.57~527.54),(526.83~540.65),(533.85~547.35),(536.75~544.45)。Visante OCT与SL-OCT(P=0.009)、A型超声测量仪(P<0.01)、OrbscanⅡz(P=0.008)的CCT测量值差异均有统计学意义。Visante OCT的CCT测量值分别低于SLOCT的CCT测量值(12.69±9.32)μm,低于A型超声测量仪的CCT测量值(19.55±8.64)μm,低于OrbscanⅡz的CCT测量值(12.96±12.21)μm。SL-OCT与A型超声测量仪(P=0.158)、OrbscanⅡz(P=0.954)的CCT测量值差异均无统计学意义。OrbscanⅡz与A型超声测量仪的CCT测量值差异无统计学意义(P=0.176)。四种方法CCT测量值均呈正相关(P<0.01)。结论:三种光学测量仪器测量CCT值与A超测量值均有很好的相关性。OrbscanⅡz和SL-OCT测量CCT值与A超的测量值基本一致。三种光学测量仪器与A超相比具有非接触性、无创性、测量时间短等特点,更易被患者接受。     

近视患者中央角膜厚度的相关因素研究

目的:探讨影响近视患者中央角膜厚度(central corneal thickness,CCT)的因素。方法:本文所研究的近视及近视散光患者共307例614眼,用全自动电脑验光仪、角膜厚度测量仪、非接触式眼压计、A超、Orb-scan分别测量屈光状态、CCT,眼压(intraocular pressure,IOP)、眼轴(axial length,AL)、前房深度(anterior chamber depth,ACD)以及角膜曲率(corneal curvature,CC)。用Pearson相关分析及一元线性回归方法统计评估CCT与眼部参数的关系。结果:CCT平均值为542.30±33.52μm。Pearson相关分析显示CCT与IOP呈显著正相关(r=0.303,P=0.000),与平均CC呈显著负相关(r=-0.129,P=0.001),而与年龄(r=-0.050,P=0.213)、屈光度(r=0.024,P=0.561)、AL(r=0.061,P=0.131)、ACD(r=-0.031,P=0.445)等因素无关。结论:近视患者CCT与IOP及平均CC有相关性,CCT每增加100μm,IOP升高2.4mmHg。     

Corneal thickness determination and correlates in Singaporean schoolchildren

PURPOSE: To determine the central cornea thickness (CCT) in Singaporean children and to examine the possible relationship between intraocular pressure (IOP) and other biometric factors and CCT. METHODS: This was a cross-sectional study. The subjects (N=652) were obtained from the Singapore Cohort Study of the Risk Factors for Myopia (SCORM). The subjects' ages ranged from 9 to 11 years. There were 485 Chinese, 92 Malayan, and 75 Asian Indian children. Measurement procedures included air-puff tonometry, noncontact slit lamp optical pachymetry, cycloplegic autorefraction, and autokeratometry. RESULTS: The mean CCT was 543.6 +/- 32.0 microm. Chinese children had thicker corneas than Malayan or Indian children (P=0.002). The boys had thicker corneas than girls (P=0.011), but the mean difference was only 6.4 microm. There was high correlation of CCT (r=0.98) and IOP (r=0.88) between right and left eyes. IOP was correlated with CCT (r=0.45, P <0.001). In a multiple linear regression model, each millimeter of mercury of IOP was associated with a CCT difference of 5.90 microm (95% confidence interval [CI], 4.98-6.82). The radius of corneal curvature correlated with CCT (r=0.19, P <0.001). The following parameters were not significantly (P >0.05) associated with CCT: age, family income, father's education, axial length, and spherical equivalent. CONCLUSIONS: The mean CCT in Singaporean children aged 9 to 11 years was 543.6 microm and showed ethnic and gender variation. CCT affected measured IOP and correlated weakly with corneal curvature. Compared with data in adults, a change in CCT was associated with a greater difference in measured IOP.     

基于儿童正视眼的眼光学模型构建

目的根据正视儿童眼部参数,构建正视儿童的眼光学模型。方法实验研究。基于“安阳儿童眼病研究”数据,包括角膜曲率半径、角膜厚度、前房深度、晶状体厚度、屈光度和眼轴长度,取右眼数据,应用ZEMAX光学设计软件构建一个符合我国儿童眼球特点的正视眼光学模型。正态性检验采用单样本K-S分析。结果共纳入正视儿童332名,年龄（7.1±0.4）岁,等效球镜度（SE）为（0.11±0.24）D。构建的正视儿童眼光学模型的光学参数为：角膜前表面曲率半径7.78 mm,非球面系数-0.18;后表面曲率半径6.4 mm,非球面系数-0.60;厚度0.54 mm,折射率1.376。前房深度3.00 mm,房水折射率1.336。晶状体前表面曲率半径12.4 mm,非球面系数-0.94;后表面曲率半径-8.1 mm,非球面系数0.96;厚度3.55 mm,折射率为梯度渐变折射率。玻璃体厚度15.94 mm,折射率1.336。视网膜曲率半径-12.3 mm,眼轴长度23.03 mm,总屈光力62.55 D。结论本研究构建了一个符合儿童正视眼特点的眼光学模型,该模型眼的总屈光力为62.55 D,眼轴长度23.03 mm,该模型可作为儿童眼正视化和近视研究的参考工具。     

尼日利亚儿童眼部生物测量和中央角膜厚度分析

目的:评估尼日利亚儿童眼部生物特征测量和中央角膜厚度(CCT),建立参考数据库。方法:对2017-11/2018-01在我院招募的儿童进行横断面观察。采用LogMAR图表和Lea图表对不同年龄组患者的社会人口学资料、视力(VA)进行评估。对8岁及以下儿童进行麻醉检查(EUA),行瞳孔扩张前后节段检查,使用卡尺测量角膜直径(CD)。采用手持式眼压计测量眼内压(IOP),用超声角膜厚度仪测量中央角膜厚度和眼轴长度(AL)。临床检查后进行睫状肌麻痹性屈光检查。采用SPSS version 17对数据进行输入和分析,通过描述性统计得出结果,完成频率和变量交叉表(P<0.05)。结果:研究共纳入66例132眼患者,年龄3~16(平均9.13±3.70)岁,男女比例为1∶1.7。年龄集中于6~10岁(42.4%),大多数患者为小学生(54.5%)。父母的职业主要是商人/非技术工人(51.6%)和专业人员/公务员(30.3%)。平均右眼、左眼VA(LogMAR)为0.45±0.46和0.45±0.44。右、左眼角膜水平直径(HCD)平均值分别为10.5±1.6、10.37±1.45 mm。右、左眼角膜垂直直径(VCD)分别为9.7±1.2 mm和9.7±1.3 mm。右、左眼平均CCT分别为556.71±2.61μm和556.47±45.53μm。近视[23例(34.8%)],近视散光[18例(27.3%)],单纯性散光[16例(24.2%)]是最常见的屈光不正类型。CCT和HCD(P=0.739)、VA(P=0.058)和屈光不正(P=0.199)之间无显著相关性。但CCT与年龄组有轻度显著相关(P=0.055)。结论:尼日利亚儿童的CCT、IOP和CD的平均值首次为人所知。CCT与VA、CD与屈光不正之间无显著相关性,需要进一步的研究来确定结果。     

中央角膜厚度、角膜曲率对Goldmann压平眼压计和非接触眼压计测量结果的影响

目的 探讨中央角膜厚度和角膜曲率对Goldmann压平眼压计(GAT)和非接触眼压计(NCT)测量结果 的影响.方法 比较性研究.选择120例门诊患者作为研究对象.应用超声角膜测厚仪测量患者中央角膜厚度,采用多功能验光仪测量角膜曲率,应用GAT和NCT测量受检者双眼眼压.应用SPSS 12.0统计学软件进行数据处理.采用直线回归法比较两种眼压计的测量结果 ,采用多重线性同归法分析中央角膜厚度、角膜曲率与两种眼压计所测眼压值的关系,应用Bland-Altman法比较NCT和GAT两种方法 对眼压测最结果 的影响.结果 GAT与NCT测量的平均眼压值分别为(18.4±4.0)mm Hg(1 mm Hg=0.133 kPa)和(17.0±4.6)mm Hg,差异有统计学意义(r=0.835,P=0.000).GAT和NCT测量的眼压值均受中央角膜厚度和角膜曲率的影响.中央角膜厚度每增加1μm,GAT测量眼压值增加0.039 mm Hg,而NCT测量眼压值增加0.064 mm Hg.角膜曲率半径每增加1 mm,GAT测最眼压值减少2.648 mm Hg,NCT测量眼压值减少3.190 nun Hg.中央角膜厚度对NCT测量眼压值的影响较其对于GAT测量眼压值的影响大.随着眼压的升高,NCT测最眼压值呈现出由低于GAT测量值到高于GAT测量值的逐渐变化趋势.结论 中央角膜厚度和角膜曲率均会影响NCT和GAT测量眼压值,而且中央角膜厚度对NCT测量眼压值的影响较其对GAT测量眼压值的影响大.     

近视患者中央角膜厚度及其相关因素分析

目的:探讨与近视患者中央角膜厚度相关的因素。方法:近视及近视散光患者2217例(4398眼),用超声角膜测厚仪测量角膜中央厚度,电脑验光仪测量屈光度,非接触眼压计测量眼压,OrbscanⅡ眼前节分析仪查角膜地形图测量角膜曲率,并统计患者性别、年龄及配戴软性角膜接触镜情况。结果:近视患者平均中央角膜厚度为548.57±30.42μm,男女眼之间、左右眼之间、低龄与高龄眼之间平均中央角膜厚度均无统计学差异。中央角膜厚度与屈光度呈正相关(r=0.506,P=0.000)。中央角膜厚度与眼内压呈正相关(r=0.634,P=0.000)。中央角膜厚度与角膜曲率之间无相关性。中央角膜厚度与是否配戴软性角膜接触镜有关,长期持续配戴软性角膜接触镜患者与无角膜接触镜配戴史患者平均中央角膜厚度的差异有显著性(P=0.000)。结论:近视患者中央角膜厚度与屈光度、眼内压及配戴软性角膜接触镜情况等因素有相关性。     

Influence of corneal structure, corneal responsiveness, and other ocular parameters on tonometric measurement of intraocular pressure

PURPOSE: To estimate the relationships between ocular parameters and tonometrically measured intraocular pressure (IOP), to determine the influence of ocular parameters on different instrument measurements of IOP, and to evaluate the association of ocular parameters with a parameter called hysteresis. METHODS: Patients presenting at a glaucoma clinic were recruited for this study. Subjects underwent IOP measurement with the Goldmann applanation tonometer (GAT), the TonoPen, and the Reichert Ocular Response Analyzer (ORA), and also measurements of central corneal thickness (CCT), axial length, corneal curvature, corneal astigmatism, central visual acuity, and refractive error. Chart information was reviewed to determine glaucoma treatment history. The ORA instrument provided a measurement called corneal hysteresis. The association between measured IOP and the other ocular characteristics was estimated using generalized estimating equations. RESULTS: Among 230 patients, IOP measurements from the TonoPen read lowest, and ORA read highest, and GAT measurements were closest to the mean IOP of the 3 instruments. In a multiple regression model adjusting for age, sex, race, and other ocular characteristics, a 10 microm increase in CCT was associated with an increase of 0.79 mm Hg measured IOP in untreated eyes (P<0.0001). Of the 3 tonometers, GAT was the least affected by CCT (0.66 mm Hg/10 mum, P<0.0001). Hysteresis was significantly correlated with CCT with a modest correlation coefficient (r=0.20, P<0.0007). CONCLUSIONS: Among parameters related to measured IOP, features in addition to CCT, such as hysteresis and corneal curvature, may also be important. Tonometric instruments seem to be affected differently by various physiologic characteristics.     

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.     

The relationship between intraocular pressure and refractive error adjusting for age and central corneal thickness

PURPOSE: To investigate the relationship between intraocular pressure (IOP) and refractive errors after adjusting for age, central corneal thickness (CCT), and other related factors. METHODS: IOP, CCT and refractive errors were measured in the right eyes of 1855 subjects, aged 40-82 years, in a cross-sectional study design. Subjects were divided into groups by refractive status: hyperopia, emmetropia, mild myopia, moderate myopia, or high myopia. With adjustments for age, CCT, blood pressure, obesity, education, hypertension, diabetes, and smoking status, IOP was estimated for each refractive status using a general linear model. RESULTS: IOP increased with advancing degrees of myopia, even after adjustment for age, CCT, and other related factors (p = 0.011). Estimated IOP of moderate myopia was significantly higher than that of emmetropia (p = 0.022). CONCLUSIONS: Our results confirm the positive association between IOP and increasing degrees of myopia. This finding would support the hypothesis that the relationship between glaucoma and myopia might be pressure mediated.