Comparison of Diaton transpalpebral tonometer wit applanation tonometry in keratoconus

• 作者: Allegonda van derLelij Natalie Peeters RobertPL Wisse SaskiaM Imhof
• 来源期刊: 国际眼科杂志：英文版
• 学科: 医学
• 关键词: Diaton Goldmann applanation tonometry transpal pebral tonometry KERATOCONUS Bland-Altman plot
• 年，卷（期）: 2016,（3）
• 页码范围: 395-398
• 页数: 4页
• 分类号: R77

摘要

AIM:To investigate the added value of using a Diaton transpalpebral tonometer(DT) to measure IOP in keratoconus.Most type of tonometers use corneal applanation or biomechanical resistance to measure intraocular pressure(IOP);however,these factors can be altered by keratoconus.Specifically,we examined whether DT can detect false-negative low Goldmann applanation tonometry(AT) measurements.· METHODS:Patients with keratoconus were recruited from our tertiary academic treatment center.Measurements included AT and DT(in random order)and Scheimpflug imaging.An age- and gender-matched group of control subjects with no history of corneal disease or glaucoma was also recruited.· RESULTS:In total,130 eyes from 66 participants were assessed.In the keratoconus group,mean AT was11.0±2.6,mean DT 11.2±5.5(P =0.729),and the two measures were correlated significantly(P=0.006,R=0.323).However,a Bland-Altman plot revealed a wide distribution and poor agreement between both measurements.Previous corneal crosslinking,corneal pachymetry,and Krumeich classification had no effect on measured IOP.· CONCLUSION:Measurements obtained using a Diaton tonometer are not affected by corneal biomechanics;however,its poor agreement with Goldmann AT values calls into question the added value of using a Diaton tonometer to measure IOP in keratoconus.