\(power \ of \ a \ lens \ (D) = \frac{1}{focal \ length \ (m)}\) A lens has a power of -3.33 dioptres. Calculate the focal length and state what type of lens it is.

If you’re new to contact lenses, you may have questions about how to wear and care for them. It may not be as simple as slipping on a pair of eyeglasses. And it may take longer to get used to them.

Canon has announced the RF 20mm F1.4 L VCM ultra-wide prime as part of its L-series "hybrid" prime lenses designed for both stills and video work. Recent Videos The 20mm F1.4 shares many ...

POLK COUNTY, North Carolina (WLOS) — The N.C. Forest Service provided the following update Tuesday on the Black Cove Complex ... evacuations in Polk County, contact Polk County Animal Control ...

An exhibition at the Louvre-Lens ... circle, intersect and inspire each other and, at times, meld into one. It opens at the Louvre-Lens on Wednesday and runs through July 21. Image “Black ...

A quick $130 mod for recording in a 21:9 aspect ratio. GoPro is now shipping the new Anamorphic Lens Mod for its Hero 13 Black camera, which allows creators to record in a wider field of view ...

Don't let your contact lenses ruin your next vacation -- follow these dos and don'ts of traveling with contact lenses. Katie covered all things how-to at CNET, with a focus on Social Security and ...

An icon of a desk calendar. An icon of a circle with a diagonal line across. An icon of a block arrow pointing to the right. An icon of a paper envelope. An icon of the Facebook "f" mark.

Circle Chart (formerly known as Gaon Chart) has announced its latest batch of official certifications! In 2018, the Korea Music Content Industry Association implemented a new certification system ...