As screen time increases and vision problems become more common at every age, many still misunderstand conditions like myopia ...

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 ...

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

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 ...

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 ...

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 ...

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 ...

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 ...

Researchers in Korea have created a new metamaterial with the most extreme positive index of refraction yet – a whopping 38.6. The metamaterial operates at terahertz frequencies and the team believes ...