Vernon S A
Academic Unit of Ophthalmology, University Hospital, Nottingham, UK.
Eye (Lond). 1993;7 ( Pt 1):134-7. doi: 10.1038/eye.1993.28.
The difference in intraocular pressure (IOP) between the highest and lowest measurements on an eye with noncontact tonometry (the range) has been reported to be less than 4 mmHg in most normals. The range of IOP to be expected with the Keeler Pulsair in normals over the age of 50 years was determined by analysing the results of IOP recordings on 741 normal individuals. Between 56% and 62% of eyes recorded a range > 4 mmHg and between 4% and 8% a range > 10 mmHg when four pulses per eye were used. Population pulse profile analysis indicated that this was not due to an erroneously high first pulse in a set of four, and that IOP asymmetry previously reported when screening females is due to a generalised tendency for IOPs in right eyes to measure higher than those recorded in the left. The occurrence of a range of IOP recordings up to 10 mmHg in an eye is relatively common with the Pulsair and individuals undergoing glaucoma screening with this instrument should not be referred purely on the basis of a large IOP range.
据报道，在大多数正常人中，使用非接触眼压计测量眼睛时，最高眼压与最低眼压之间的差值（眼压波动范围）小于4 mmHg。通过分析741名正常个体的眼压记录结果，确定了50岁以上正常人使用Keeler Pulsair眼压计所预期的眼压波动范围。当每只眼睛测量4次脉冲时，56%至62%的眼睛记录的眼压波动范围>4 mmHg，4%至8%的眼睛记录的眼压波动范围>10 mmHg。总体脉冲轮廓分析表明，这并非由于一组4次测量中首次脉冲错误地偏高，先前在筛查女性时报告的眼压不对称是由于右眼眼压普遍倾向于高于左眼记录的眼压。使用Pulsair眼压计时，一只眼睛出现高达10 mmHg的眼压波动范围相对常见，因此，不应仅基于较大的眼压波动范围就将使用该仪器进行青光眼筛查的个体转诊。
