Traditional progressive lenses are made from semi-finished lens blanks with no cylindrical power (spherical power) on the front surface. Instead, spherical power is added to the back surface. However, this type of progressive lens is becoming obsolete, as it is less accurate than other available alternatives. The corridor (the area of the lens that corrects vision) is relatively narrow.
Digital progressive lenses this lens design delivers an optimal optical field of view when tailored to the wearer’s optical needs. Digital lens surfacing technology is primarily applied to progressive prescription lenses.
These digital progressive lenses feature wider zones for distortion-free near vision and distance vision. Another advantage of digital progressive lenses is high-definition vision in the intermediate zone (between near and distance vision). This enhanced visual performance is highly beneficial for computer work and other daily activities.
Digital lenses are computer-designed to achieve maximum clarity and accuracy. They are now more frequently recommended by optometrists than traditional alternatives due to their numerous benefits. One key advantage is that these lenses are custom-surfaced based on the wearer’s specific prescription, frame dimensions, and fitting position.
These factors are crucial for precise vision correction, owing to the lens design. Since the same optical frame may sit higher on one wearer’s face and lower on another’s, precise specifications and measurements are essential to ensure optimal comfort and optical performance. Progressive lenses optimized for computer use also feature wider, more precise corridors, resulting in improved peripheral vision. Additionally, digital free-form progressive lenses incorporate technology that reduces edge blur in the peripheral visual field.
The core difference between digital and traditional progressive lenses lies in the ability to customize the lens zones for individual wearers. Digital progressive lenses are calibrated to the wearer’s facial structure and eye positions to ensure the most accurate prescription correction.
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