“The term ‘DS’ on an eyeglasses prescription means ‘diopters sphere.’ This indicates the patient has a normal, spherical eye shape and does not need astigmatism correction. If there is a ‘Cyl’ value, it means a cylindrical lens is needed for astigmatism correction, and the ‘Axis’ shows the angle for the lens tilt.” The ‘Cyl’ on … Read more
An eyeglass prescription details your vision correction needs. It includes lens power, measured in diopters, to adjust for nearsightedness (negative numbers) or farsightedness (positive numbers). The abbreviations OD (right eye) and OS (left eye) specify the requirements for each eye. The prescription usually has three main components: sphere, cylinder, and axis. Sphere measures the overall … Read more
Dual Pupillary Distance (DPD) is the measurement from the bridge of the nose to the center of each pupil. This accurate measurement is essential for proper lens fitting in eyeglasses. Correct DPD ensures balanced lens placement, improving vision correction and comfort based on each eye’s unique position. A correctly measured DPD supports optimal lens performance … Read more
“VA means Visual Acuity on an eyeglass prescription. It measures clarity of vision. You may see DVA (Distance Vision Acuity) for distance and NVA (Near Vision Acuity) for close vision. Knowing these terms is essential for understanding your vision needs and ensuring correct eyeglass fitting.” Understanding “Dist VA” helps individuals grasp their visual needs. For … Read more
Deep base means the lens curvature of eyeglass lenses, measured in diopters. It shows how much a lens fits the shape of your face. An appropriate base curve matches the frame bevel curve. Understanding deep base is essential for fitting and achieving optimal vision correction, so consult your eye care professional for the right prescription. … Read more
Sph (sphere) indicates long-sightedness or short-sightedness in eyeglasses. Positive values represent long-sightedness, while negative values indicate short-sightedness. A higher number means a stronger lens. Cyl (cylinder) measures the severity of astigmatism. Knowing these terms is crucial for selecting the right glasses. CYL, or cylinder, measures the lens power needed to correct astigmatism. Astigmatism occurs when … Read more
The phrase “bring a tear to a glass eye” means to create strong emotions or sadness. It often describes experiences that move people deeply. For example, “The film’s ending brought a tear to my eye.” This idiom highlights profound emotional impact, often connected to touching moments. Though glass eyes are inanimate, the idiom suggests that … Read more
The axis in eyeglasses is a degree measurement that shows the direction of cylindrical power needed to correct astigmatism. It helps lens providers align the lens meridian accurately. This ensures effective correction for the refractive error without indicating the strength of the lenses. Astigmatism occurs when your eye is shaped more like a football than … Read more
An eye seal on safety glasses acts as a protective barrier. It guards against hazards like dust, fibres, and liquid splashes. The eye seal ensures a positive fit between the glasses and the face. This design prevents gaps, keeping harmful particles out. It is essential for eye safety in various environments. Furthermore, the eye seal … Read more
A prescription of 1.75 indicates moderate vision impairment. A negative (-1.75) value means shortsightedness, causing blurry distant vision. A positive (+1.75) value indicates farsightedness, affecting close vision. Corrective lenses help improve visual acuity and aid in better eye care. When interpreting the prescription, look for additional measurements. The prescription may include values for both eyes, … Read more