are intended to improve your vision. Today, with the many great
styles available, they can also allow you to express your personality,
enhance your best features and create the perfect look for you.
Optometry provides the finest quality in both the products we
sell and the services we offer. Our doctors and staff are trained
to listen to your specific visual needs and to help you choose
the design which best meets those needs.
Spectacle frames are available in a large array of materials.
Metals such as stainless steel and titanium are generally more
expensive than plastics such as cellulose proprionate and zylonite.
Titanium frames are stronger, thinner and lighter than many other
metals but they are more difficult to manufacture which increases
the cost. Soldering equipment used for nickel and steel frames
will not work on titanium. There are also different grades of
titanium depending on the purity of the metal.
frames are made either by plastic injection moulding (cellulose
propionate) or they are cut out of sheet of plastic (zylonite).
Cost differences between plastic frames will depend on the
material, colouring, trim and country of origin.
pads, hinges and screws are features of the frame that affect
the wearer on a daily basis. Silicone nose pads are more expensive
than plastic but they reduce the slippage of the frame. Spring-hinges
also help to keep the frame aligned and in shape regardless of
how often the glasses are on and off in a day. Quality frame manufacturers
are starting to use polymer-coated screws so they are less likely
to come loose. This has become necessary as the frame designs
become more delicate and the screws have less thread grip than
on the older more industrial frame designs.
All of our lenses come with a standard 2-side scratch resistant
coating called Nikon H coating or Essilor TD2. These are
superior formulas that combines the hardness of plastic
with the flexibility of plastic. Both coatings have a two
year warranty against manufacturers defects and normal wear
and tear of eyeglasses.
lenses can provide UV protection to reduce your risk of macular
degeneration, cataracts and skin cancer of the eyelids. The UV
protection can be added as a clear coating on the lens which is
called UV400. Some lens materials such as safety plastic have
UV protection as an inherent quality of the material. Alternatively
Transitions lenses are clear indoors and go dark outdoors when
exposed to UV. Transitions provide full UV protection at all times.
you are looking for a pair of sunglasses, the lenses can be tinted
with a variety of colours with grey and brown being the most popular.
Polarized sunglasses are especially helpful to block glare from
the water and are preferred by boaters and fishermen.
single vision lens is the same power through-out the lens. Most
commonly the focus is set for distance vision and your eye muscles
adjust to allow you to focus up close.
people reach their 40's the eye muscles that used to help change
focus gradually lose that ability and it becomes difficult to
read when wearing your distance lenses. At this time it is often
necessary to use either a bifocal or progressive lens design.
lenses have a line separating the top of the lens which focuses
in the distance from the bottom of the lens which focuses at one
near point usually 40 cm from your eyes. There is a distinct change
of focus as your eyes switch between the different sections of
the lens. This lens design does not have any area that is specifically
focused for a computer screen which is usually about 70 cm from
lenses look like single vision lenses in that they have no lines
separating the different areas of focus. The top of the lens allows
clear distance vision and as you turn your eyes down the focus
changes gradually to intermediate (computer distance) and then
near (reading). In order to get the gradual change in focus, this
lens design does have some areas of distortion which are placed
to the side of the lens. As a result, when wearing a progressive
lens you will have to turn your head slightly when you want to
look to the side.
are many different designs of progressive lens. The early designs
which were made about 20 years ago are still available on the
market today but they do not work well as they have large amounts
of distortion throughout most of the lens. Fortunately newer progressive
designs allow a much larger area for clear vision and are generally
easy to adapt to. At Spectrum Optometry we will discuss with you
how you use your eyes on a daily basis so we can recommend the
best progressive lens design for you. Some progressives are best
for people who use a computer full time. Other progressives are
designed to be used in a smaller frame size.
doctors and staff at Spectrum Optometry are committed to Bringing
Vision to Life. We want to help you find the best solution available
for your specific visual needs.