Comparison of Two Different Pupillometer

Pupil diameter is a parameter of great interest in understanding brain systems and modern refractive surgery. Pupillometry, the measurement of variations in pupil dilation, has offered encouraging evidence for the involvement of disturbed reactivity in depression risk, according to studies. Traditional vision screening methods in children can be difficult due to poor cooperation and labour-intensive procedure, and therefore, a handheld photorefractometer offers reduced assessment time in detecting refractive errors. 2WIN uses infrared light, the patient is not aware of the several, rotating photoscreen images being exposed to afford multiaxial estimation of spherical and astigmatic refractive error.The purpose of this prospective study was to compare 2WIN and OPD Scan III pupillometers.

Inclusion Criteria:>18 years oldsigned informed consentwilling to participate in the studyExclusion Criteria:abnormalities of the pupil (e.g., synechia, ectopia)corneal scarsirregular astigmatismstrabismusacute or chronic uveitisany kind of previous eye surgerymedication that could have an influence on pupil reaction or size