His new refraction is found to be -4.25 D OU, which explains the shortened reading position, since his old glasses undercorrect his distance vision and leave him with 1.25 D of uncorrected myopia.

The real refractive index and the absorption index may be measured simultaneously, which provides a full picture of a material's linear response to incident light. Journal.

Cyclopentolate 1% and tropicamide 1% had similar efficacies for cycloplegic refraction in youth and adults without strabismus, according to a study.Such findings “have significant implications ...

Refraction occurs when light changes direction as it passes, e.g., ... Nov. 24, 2020 — Watching metamaterials at work in real time using ultrafast electron diffraction: ...

Figure 2: While there is no theoretical obstacle to negative refraction, materials that have a negative refractive index do not occur naturally. An artificial metamaterial made from grids of rings and ...

Moreover, in three examples considered here, the temperature does not remain constant for ht ⩽ h, but continues to decreases to a minimum at hm ≈ 16 km, and then increases at higher altitudes at a ...