Types of Optical Lenses
Correct vision for a single focal length (distance, intermediate, or near).
Used to correct myopia (nearsightedness), hyperopia (farsightedness), or astigmatism.
Have two distinct optical powers in one lens.
- Typically divided into an upper segment for distance vision and a lower segment for near vision.
Provide a seamless progression of multiple optical powers for distance, intermediate, and near vision.
Avoid the visible lines found in bifocal lenses
CR-39 : Standard plastic lenses, lightweight and impact-resistant.
Polycarbonate : Highly impact-resistant, suitable for sports eyewear and safety glasses.
High Index: Thinner and lighter than CR-39, ideal for strong prescriptions.
Trivex: Lightweight, impact-resistant, and provides optical clarity similar to polycarbonate.
Anti-Reflective Coating (AR): Reduces glare and reflections, improves vision clarity.
Scratch-Resistant Coating: Increases durability and longevity of lenses.
UV Protection: Blocks harmful UV rays from reaching the eyes.
*Blue Light Blocking: Filters out blue light emitted from digital screens, reducing eye strain.
How Optical Lenses Work:
Refraction
Optical lenses work by refracting (bending) light rays as they pass through the lens material. This refraction helps to focus light onto the retina, correcting vision problems.
Prescription
-Lenses are prescribed based on an individual's specific refractive error, measured in diopters. Negative diopters correct myopia (nearsightedness), positive diopters correct hyperopia (farsightedness), and cylindrical lenses correct astigmatism.
Fitting
Optical lenses work by refracting (bending) light rays as they pass through the lens material. This refraction helps to focus light onto the retina, correcting vision problems.