The Influence of Central Corneal Thickness and Corneal Curvature and Axial Length on the Measurement

• 作 者: Qing Li Minru Li Zhigang Fan Ningli Wang
• 机 构: Medical College of Sun Yat-sen University, Guangzhou 510089, China“,”Zhongshan Ophthalmic Center, Su
• 出 处: 眼科学报
• 发表日期: 2002年3期
• 关键词: intraocular pressure central corneal thickness corneal curvature axial length

Purpose: To examine the influence of central ceal thickness (CCT), ceal curvature (CC), and axial length (AL) on intraocular pressure (IOP).Methods: Eighty-one clinically normal eyes were included in our study. The IOP, CCT, CC, AL were measured using a Goldmann applanation tonometer, optical pachymeter, keratometer and A-scan ultrasound biometer respectively in all subjects.Results: A highly significant positive correlation was identified between IOP and CCT. Linear regression analysis suggests that an increase in CCT of 0. 010 mm is associated with a 4. 946 mmHg increment in IOP. No significant positive correlation was identified between IOP and CC. P values are 0. 724 and 0.414 respectively for vertical and horizontal readings. A paradoxically reversed correlation was present between IOP and axial length.Conclusion: Ceal thickness is a very important confounding factor in the measurement of intraocular pressure, which warrants further attention in our clinical practice.