A wildlife photographer says that a Canon RF 200-800mm lens snapped while packed in a bag but riding on a snowmobile ...

[Zach] over at his channel Breaking Taps has put up an extraordinary account on manufacturing some homemade acrylic lenses ... the optical properties of a material by a single number, i.e its ...

The intraocular lenses are made of silicone, acrylic, or other plastics and are coated in material to protect the eyes from the sun's ultraviolet rays. Similar to prescription glasses and contact ...

The lens is then cut out with an 8mm endmill, removed from the stock material, and wet sanded to ... which is done with an acrylic glue, in this case Acrifix adhesive. The result is remarkable: ...

The evolution of smaller surgical incisions was matched by the development of new lens implants created out of different materials (such as acrylic and silicone) that could be folded to allow the ...

Phakic IOL technologies have undergone substantial improvements in recent years, with progressive upgrades in design and ...

Cataracts—natural clouding of the lens of the eye—are the most ... surgery and received an IOL made of a material remarkably similar to the acrylic that had lodged in his eye in 1940.

Light is refracted when it enters a material like water or glass. Depending on the density of the material, light will reduce in speed as it travels through, causing it to change direction.