Thinner, lighter high-index lenses are especially recommended if you have a strong eyeglass prescription for nearsightedness, farsightedness or astigmatism. High-Index Lenses 1- Thinner. Because of ...

Abstract: Contact lenses are widely used for correcting refractive errors and treating various ocular disorders. However, their thickness and refractive index can change over time due to dehydration ...

A research team develops a transparent silicon without visible light loss by controlling the silicon atomic structure. A POSTECH research team has developed a transparent amorphous silicon that ...

Not all IOLs that are labeled as +20 D will provide the same postoperative refractive result, even if used in identical eyes. The reason is that while the lens power may actually be +20 D when ...

TOKYO--(BUSINESS WIRE)--Mitsui Chemicals, Inc. (Tokyo: 4183; President & CEO: HASHIMOTO Osamu) today announced that its MR™ series of high refractive index lens monomers has been picked up and ...

Who doesn’t love a nice nifty-fifty? There’s something about a vintage, normal-length prime lens that just unlocks a level of ...

---As the limits of LASIK became more evident, the range began to be reduced and was approximately +4 D to –14 D early this year. (Figure 2) Refractive lensectomy and replacement with a pseudophakic ...

ABSTRACT Astronomical optics may encounter a wide range of nighttime temperatures (∼−10°C to +20°C) at mountaintop observatories. Complex refractive optics used in high‐performance spectrographs and ...