If your doctor prescribed a particular brand of contacts, it's best to stick with a retailer that offers that brand.

We sell different types of products and services to both investment professionals and individual investors. These products and services are usually sold through license agreements or subscriptions ...

Soft multifocal lenses show promise as a management tool for accommodation and vergence disorders in patients without presbyopia.

In earliest times, circuits could be broken only by separation of contacts in air followed by drawing the resulting electric arc out to such a length that it can no longer be maintained. This means of ...