Objective real-time measurement of instrument myopia in microscopists under different viewing conditions

被引:8
作者
Ting, Patrick W. K. [1 ]
Schmid, Katrina L.
Lam, Carly S. Y.
Edwards, Marion H.
机构
[1] Hong Kong Polytech Univ, Sch Optometry, Ctr Myopia Res, Hong Kong, Hong Kong, Peoples R China
[2] Queensland Univ Technol, Sch Optometry, Brisbane, Qld, Australia
关键词
accommodation; instrument myopia; microscopists; myopia; PowerRefractor;
D O I
10.1016/j.visres.2006.01.014
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
While instrument myopia is known to occur when microscopes are used, little is known about the accommodation response during microscopy, or about the factors which may alter the magnitude of instrument myopia. In addition, there has been no real-time objective measurement of instrument myopia during the microscopy task. Twenty inexperienced subjects and 10 experienced microscopists (average work experience of 4.8 years (SD 3.2 yr)) with mean age of 24.1 years (SD 2.9 yr) and 31.2 years (SD 2.9 yr) respectively were recruited to the study. Instrument myopia was measured using an infrared photorefractor (PowerRefractor) under different viewing conditions and microscope settings (with different forms of refractive error correction, changes in target quality, changes in eyepiece power settings, changes in magnification and changes in illumination of the target). Instrument myopia was greater in inexperienced (1.98 D (SD 0.91 D)) than in experienced (1.38 D (SD 0.75 D)) microscope users. There was no statistically significant change in the level of instrument myopia under the different viewing conditions or different microscope settings, and there were large individual variations. Other factors may play more of a role in determining the degree of instrument myopia during microscopy than the task variables altered here. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2354 / 2362
页数:9
相关论文
共 58 条
[1]  
Abbott ML, 1998, OPHTHAL PHYSL OPT, V18, P13, DOI 10.1016/S0275-5408(97)00072-0
[2]   PREVALENCE OF MYOPIA AND MYOPIC PROGRESSION IN A POPULATION OF CLINICAL MICROSCOPISTS [J].
ADAMS, DW ;
MCBRIEN, NA .
OPTOMETRY AND VISION SCIENCE, 1992, 69 (06) :467-473
[3]   Repeatability and validity of the PowerRefractor and the Nidek AR600-A in an adult population with healthy eyes [J].
Allen, PM ;
Radhakrishnan, H ;
O'Leary, DJ .
OPTOMETRY AND VISION SCIENCE, 2003, 80 (03) :245-251
[4]  
[Anonymous], 1997, EYE VISUAL OPTICAL I, DOI DOI 10.1017/CBO9780511609541
[5]  
BAKER JR, 1966, J ROYAL MICROSCOPICA, V85, P231
[6]   Non-cycloplegic screening for amblyopia via refractive findings with the Nikon Retinomax hand held autorefractor in 3 year old kindergarten children [J].
Barry, JC ;
König, HH .
BRITISH JOURNAL OF OPHTHALMOLOGY, 2001, 85 (10) :1179-1182
[7]  
Birnbaum M H, 1985, J Am Optom Assoc, V56, P480
[8]  
BIRNBAUM MH, 1985, AM J OPTOM PHYS OPT, V62, P361
[9]  
BOBIER WR, 1985, AM J OPTOM PHYS OPT, V62, P614
[10]  
Bullimore MA, 2002, INVEST OPHTH VIS SCI, V43, P2110