Step 1. Types of Lenses
Choosing new glasses is exciting! Today, there are many options in design and function to pick from. But remember - not all lenses are created equal. The best lens for you depends on your prescription, visual needs and lifestyle.
Single Vision Lens
Single vision lenses have the same focal power throughout the lens to provide a single focus.
Progressive Lenses (Multifocal Lenses)
Progressive lenses provide a gradual transition in power within the lens to see at all distances from near at hand to far across the room. If you are in your 40s or older and have presbyopia, wearing progressive lenses have an advantage to see all distances clearly without taking the eyeglasses off and on.
Step 2. Lens Materials
Glass lenses were the first material to be used for eyeglass lenses. Since the advancement of plastic materials, glass has become a less favorable option as it is heavy compared to plastic lenses and prone to breakage.
The first plastic lens to be manufactured was the 1.50 index
This category of lenses ranges in material index from 1.60 to 1.74, the highest index currently available. Over the years, innovations in plastics has made it possible to produce higher indices, resulting in increasingly thinner and lighter lenses. The higher the index, the thinner and lighter the lens.
Inherent in all Nikon high index lenses is 100% UV protection.
High index lenses have a higher resistance to breakage .
Step 3. About Coatings
Lens coating provides increased protection and improves the performance of the lens.
- Anti-reflective coatings help transparency in the lens and glare from various lightings.
- Other optional coatings such as scratch resistance, smudge and water resistant surface applications extend the lifespan of the lenswear.