Rotator cuff injuries cause pain in your shoulder and upper arm. The pain may be most noticeable when you reach up or out. When you turn your arm as you lift it, the tendons are more likely to rub against surrounding structures.
The essential difference between the original series of AF Nikkor lenses and all AF lens types introduced subsequently, from the AF-D versions onwards (see below), concerns the compatibility of a particular lens with Nikon's enhanced Matrix metering system known as 3D Matrix metering that was introduced during 1996.
If you are an active person, polycarbonate lenses usually are the best choice for your eyeglasses, sunglasses and sports eyewear. Polycarbonate lenses are thinner and lighter than regular CR-39 plastic lenses. They also offer 100% protection from the sun's harmful UV light and are up to 10 times more impact-resistant than plastic or glass lenses.