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Choose your spectacles carefully!
Need to buy a pair of spectacles and are confused because of the many shapes,
sizes, colours and materials available?
Here’s what you should look at so that you end up with a pair
of glasses that enhance the quality of your vision, meet your individual
prescription needs and complement your face.
Lenses
While most people choose the frames first, it is important to remember
that lenses are critical in ensuring the quality of vision. If you
choose the frames first you may end up with lenses that don’t
fit right or miss out on features that enhance comfort and eye protection.
Lens designs and lens enhancements to consider include:
• Single Vision, Bi-focal/Multi-focal or Progressive Lenses.
• High-Index Lenses.
• Polycarbonate Lenses.
• Trivex™ Lens Material.
• Anti-reflective (AR) Coatings.
• Photo chromic Lenses.
• Tinted Lenses.
• Polarized Lenses.
Lifestyle
It is important to let your doctor and optician know the kind of
lifestyle you lead so that he can help you make the right choice.
Working in front of the computer for long hours requires the eye
to constantly focus on a short distance. This can cause a significant
amount of eye strain and eye fatigue. The individual's vision, type
of work, distance from the computer and lighting in the work area
are important factors to consider while choosing the lenses.
If you spend lot of time outdoors, your eyes need UV protection
just like your skin does. Plastic photochromic lenses that block
100 per cent of UV and provide protection from glare are a good
bet. These lenses go from clear indoors to comfortably dark in the
presence of UV light and they can be worn indoors as well as outdoors.
If you are actively engaged in contact sport activities the lenses
you choose would need to be strong and shatter proof so that minimal
injury is caused to the eye.
Polycarbonate photochromic lenses are ideal as they are shatter
proof and provide protection.
Buying prescription spectacles can be tricky today considering the
overwhelming number of choices the market offers. Here’s some
help protection from UV radiation and glare. Driving requires lenses
that protect the wearer from glare. Polarized lenses offer protection
from glare during the day but are not recommended for night driving.
In this situation anti-reflective treatment on the lenses is highly
effective in minimising the effects of glare from oncoming traffic.
There are polarized photochromic lenses available in the market
today, that are designed to address the task of driving during day
time.
Frames
Depending on your prescription, certain type of frames may be more
or less optimal. For example, if you have a strong ("high-minus")
prescription, your lenses might look better in a smaller frame.
The guidelines below will help you select frames that complement
your face.
• Long Nose: Low, dark, straight bridges shorten the nose.
• Close-set eyes: Clear bridges widen close-set eyes.
• Wide-set eyes: Dark bridges make wide-set eyes appear closer
together.
• Thick Rx: Oval shapes and high-index lenses minimise thickness
of Rx.
• High Forehead: To shorten a high forehead, try a frame that
is even with the brow, or slightly higher.
• Wide Jaws: Wide jaws can be offset by a narrow frame with
a pronounced horizontal line.
• Narrow face: Decorative or contrasting temples can widen
a face.
Source: Monica Chaudhry, the author is Senior Optometrist,
AIIMS
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