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. According to research, the pupil dilates in reaction to stimuli requiring a larger cognitive load or a greater emotional intensity. Importantly, studies have related pupil size variations to brain activity in regions associated with emotion regulation, including the dorsolateral prefrontal cortex (DPFC) and the agenesis of the corpus callosum (ACC) . Thus, pupillometry is proposed as a viable peripheral gauge for a variety of brain systems involved in the processing of emotional information.

Some of the postoperative complaints of patients having refractive corneal or lens surgery are related to visual quality and are associated with large pupils since optical aberrations become more dominant when the pupil dilates . If the pupil size exceeds the optical zone size, a marked increase in higher-order aberrations could be observed. Patients might complain about poor contrast sensitivity, increased glare disability, or halos. Precise measurement of scotopic pupil diameter has therefore become an essential step in the preoperative evaluation of patients suitable for refractive surgery and is an important inclusion or exclusion criterion.

This study aimed to assess the agreement and reproducibility of scotopic pupil size measurements using 2WIN-S compared with OPD-Scan III in Chinese adults.

Inclusion criteria

• >18 years old
• signed informed consent
• willing to participate in the study

Exclusion criteria

Exclusion criteria

were ocular pathology known to interfere with pupillometer outcome and pupil abnormalities (eg: glaucoma, iritis, cataract, corneal scarring, any history of ocular surgery, and history of trauma.)