inTRO to ipRGCs ( Intrinsically Photosensitive Retinal Ganglion Cells)

Rods, cones, and…ipRGCs? For almost a century and a half, it was believed that the mammalian retina only had two types of photoreceptors, rods and cones. That assumption was not proven to be false until some studies in the late 1990s proved the existence of a third kind mammalian photoreceptor that differed greatly from rods […]

Measuring Sleep Regularity

What is sleep regularity and why is it important? Sleep regularity is a gauge of how consistent a person’s sleep patterns are, based on the day-to-day variability in their sleep–wake times. In general, having poorer sleep regularity, or irregular sleep patterns, has been shown to lead to many adverse outcomes in metabolism, mental health, and […]

Shift Work Disorder

What Exactly is Shift Work Disorder? Shift work disorder, or SWD, is a type of circadian rhythm sleep disorder which is caused by working shifts that do not fall within the conventional working hours of around 9 am – 5 pm. These shifts overlap with periods of significant light sensitivity which can cause shift workers […]