Bifocals are special multi-focal glasses. They are suitable for people who have two refractive errors. What are bifocals? Bifocals eliminate the need to switch between distance and reading glasses. With the help of bifocals, two different refractive errors can be corrected at the same time. The Latin term ‘bifocal’ means ‘two’ (‘bi’) and ‘focal point’ … Bifocals: Applications & Health Benefits
The convergence reaction is the reflexive constriction of the pupils during convergence, on the one hand, and the inward movement of both eyes during fixation of near objects, on the other. Impairments of convergence can cause strabismus, among other conditions. What is the convergence response? Convergence is a specific type of opposite eye movement. Without … Convergence Reaction: Function, Tasks, Role & Diseases
Progressive-vision contact lenses have a similar benefit for contact lens wearers as progressive-vision glasses do for eyeglass wearers: they enable sharp vision at near and far distances using the same medium. Today, these continuously technically advanced vision aids offer the same level of comfort as other contact lenses. What are varifocal contact lenses? Progressive contact … Gleaming Contact Lenses: Applications & Health Benefits
Varifocals combine the correction of nearsightedness and farsightedness. They have a special design in which the visual ranges for near and far vision are individually ground into each lens. Especially for nearsighted people with incipient presbyopia, progressive glasses are a helpful development. What are varifocals? Varifocals belong to the so-called multi-focal glasses. These glasses have … Varifocals: Applications & Health Benefits
