Pertaining to illumination between the photopic and scotopic ranges.
[meso- + G. opsis, vision]
Farlex Partner Medical Dictionary © Farlex 2012


Ability to see at low levels of light (e.g., at twilight).
mesopic (mĕs-ŏp′ĭk), adjective
Medical Dictionary, © 2009 Farlex and Partners
References in periodicals archive ?
Visual performance with multifocal intraocular lenses: mesopic contrast sensitivity under distance and near conditions.
Assessment of Pupil Diameters of Emmetropes and Myopes under Photopic, Mesopic and Scotopic Conditions, Using the Infrared Pupillometer Integrated Within Schwind Sirius Multifunctional Diagnostic Device.
o Large optic which may be better for young patients and large mesopic pupils: The EVO Visian ICL has an expanded optic diameter, which means it is better suited for patients with larger pupils.
To obtain accurate measurements, all the patients have been set under mesopic light conditions.
LogMAR visual acuity (VA) was assessed under monocular vision with best spectacle correction, in two different controlled lighting conditions: photopic (85cd/[m.sup.2]) and mesopic (3 cd/[m.sup.2]).
The evaluation room was maintained with background lighting conditions in the mesopic range, and stimuli ranged from 0.161 to 3.211 cd/[m.sup.2].
Oshika, "Mesopic Contrast Sensitivity and Ocular Higher-Order Aberrations after Overnight Orthokeratology," American Journal of Ophthalmology, vol.
During twilight, both our rods and cones operate (mesopic vision) and complement each other by providing a mix of fairly good resolution and faint-light sensitivity.
The potential benefits relate to mesopic vision--the transition in the human eye from cone sensitivity to rod sensitivity in lower light situations.
Tests such as the contrast sensitivity test were performed in highly mesopic illumination conditions (12 lux).
Ocular higher-order aberrations and mesopic pupil size in Individuals screened for refractive surgery.