👉 The term "nitrometric" is a medical term that refers to a specific type of measurement device used in ophthalmology. It involves measuring the refractive power (or "nitrogen") of the eye by observing how much light enters and leaves the eye through different parts of the lens, such as cornea and retina. This process helps in diagnosing various diseases related to vision, including cataracts, glaucoma, and diabetic retinopathy.