Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.
A myodisc is a historical design of a high-plus power eyeglass lens, typically used to correct extreme farsightedness or vision after cataract surgery. The lens features a small, high-power central zone surrounded by a flatter, non-corrective carrier lens. This design helped reduce lens thickness and weight.
read more about myodisc ...The myodisc design addresses the extreme thickness and weight that result from high-power farsighted corrections. The central, high-plus zone provides the magnification and clear vision.
By limiting this thick area to only the central vision part, the surrounding carrier section can be made much thinner. This design reduces the lens's overall weight and noticeable bulge, making the glasses more cosmetically acceptable and comfortable to wear.
Myodisc lenses are used for people who have aphakia or severe hyperopia. Because these conditions require a high plus (+) power lens, the myodisc design provides a better cosmetic and weight solution compared to trying to make the entire lens surface that thick.
The main drawback of the myodisc are in appearance and optical clarity. The high-power center zone creates a visible "bullseye" effect. The abrupt change between the central zone and the carrier causes significant distortion when a wearer looks through a periphery.
Modern high-index materials and sophisticated lens grinding techniques have replaced myodisc. Today, lenses with smooth aspheric curves reduce bulk and peripheral distortion for strong prescriptions without the need for a segmented design.
They are very rarely made, mainly replaced by high-index and aspheric lens designs.
Yes, the thinner carrier lens helps reduce the magnification effect common in high-plus lenses.
They are used for very high-plus prescriptions, often above +12.00 diopters.
If you have an extremely high prescription and find that standard high-index lenses are still too heavy or cause significant distortion, ask your optician about specialized "lenticular" or myodisc designs to improve comfort and weight.
The Vision Council. Special Purpose Lenses (thevisioncouncil.org). 2024.
ABDO. Lenticular Lenses for High Ametropia (abdo.org.uk). 2023.
Optical Journal. Evolution of High-Power Lenses (opticaljournal.com). 2024.
Review of Optometry. High-Index Dispensing (reviewofoptometry.com). 2024.