A superlattice comprising alternating layers of negative-refractive-index photonic crystals and positive-refractive-index dielectric media has been shown to exhibit an effective refractive index of ...

FDA approvals in 2025 introduced novel therapies and devices across ophthalmic subspecialties, emphasizing sustained efficacy ...

Astigmatism (uh-STIG-muh-tiz-um) is a type of refractive error where one or more of the eye’s surfaces are not smooth and/or ...

Different IOL calculators provided similar results in patients with a history of LASIK surgery, according to a study ...

Refractive errors are common eye issues that can cause blurry or distorted vision. Treatment usually involves wearing glasses or contact lenses or getting procedures ...

Please provide your email address to receive an email when new articles are posted on . Refractive outcomes after cataract surgery may be worse in eyes that underwent scleral buckling. Surgeons should ...

High refractive index polymers (HRIPs) are essential for manufacturing modern optoelectronic devices, including displays and light sensors. However, high-performance HRIPs are expensive and ...

A refraction test is usually given as part of a routine eye examination. It may also be called a vision test. This test tells your eye doctor exactly what prescription you need in your glasses or ...

Astigmatism is a common vision problem caused by an error in the shape of the cornea. Symptoms can differ from person to person but may include blurry vision and ...

A property of a material that changes the speed of light, computed as the ratio of the speed of light in a vacuum to the speed of light through the material. When light travels at an angle between two ...

Patients who have a new type of lens implanted in their eyes during surgery for cataracts or to correct their eyesight have excellent or good vision over distances both near and far, and often no ...