A product range is a collection of contact lenses or care products marketed by a single manufacturer under the same brand name. Within such a range, you will usually find several variants tailored to different wearing times, eye characteristics or usage situations.
Take, for example, a product range of daily disposable lenses that, in addition to a standard version, also offers a variant for astigmatism or multifocal lenses. Or a range of monthly lenses with different water contents and oxygen permeability. You’ll also find product ranges for lens solutions and eye drops: for example, a single brand might market a peroxide system, an all-in-one solution and a saline solution under the same name.
Manufacturers use product ranges to keep their offering organised and to cater for different needs within a single recognisable brand identity. For you as a wearer, this makes it easier to switch between products within a trusted brand if your wearing pattern or eye condition changes.