Here's how an innovative flat lens could solve these problems for satellites and space-based telescopes. Understanding ...

Though still only in the prototype stage, this flat lens could one day be used on space telescopes, and perhaps even on ...

Lenses are usually made from glass or plastic ... from the normal – a line at 90° to the refracting surface. It is refraction that makes some objects appear to bend when they are viewed ...

Contact lens fitting may be adversely influenced by dry eyes, a common side effect of refractive surgery. Appropriate management of tear deficiency is of paramount importance. Corneal topography ...

The wider the lens, the more light it captures, enabling us to see things too faint for the eye alone; while a thicker lens allows greater light-bending, increasing magnification. Besides refraction ...

In patients who have previously undergone corneal refractive surgery, the asymmetric segmental design of the Acunex VarioMax ...

Individually adjustable parameters, such as subjective refraction, wear duration and contact lens type, allow the patient's preferences to be taken into consideration.

In lens refractive surgery, corneal topography improves the accuracy of intraocular lens power calculation in eyes with prior keratorefractive surgery and guides the design of wavefront-corrected ...

Today, eye care professionals manage the handicap of presbyopia with eyeglasses, contact lenses, refractive surgery or eye drops. A few thoughts on these four modalities. The first reading glasses ...