given idea about sunglasses

1. SUNGLASSES
MADE BY : AMAN PATHAN
FROM : BHARTIMAIYA
COLLEGE OF OPTOMETRY

2. TODAY WE ARE SEEING……..
(1) INTRODUCTION
(2) HISTORY
(3) IDEAL PROPERTIES
(4) OTHER NAME
(5) STANDARD
(6) CONSTRUCTION
(7) FUNCTION
(8) USES
(9) ADVANTAGE & DISADVANTAGE
(10)MAJOR BRANDS

3. WHAT IS SUNGLASSES???
• Sunglasses is a form of protective eyewear designed
primarily to prevent bright sunlight and high-energy
visible light from damaging or discomforting the eyes.
• They can sometimes also function as a visual aid, as
variously termed spectacles or glasses exist, featuring
lenses that are colored, polarized or darkened. In the
early 20th century they were also known as sun
cheaters.

4. IDEAL PROPERTIES
• According to pitts and kleinstein the ideal pair of
sunglasses should do the following:
(1) Reduce the intensity of sunlight for optimum visual
comfort & visual performance.
(2) Eliminate parts of the optical spectrum that are not
required for low vision and are hazardous to the
eyes.
(3) Resist impact & scratching and only require a
minimum of care.

5. (4) Provide enough protection while being worn during
the day so that the wearer’s dark adaptation and
night vision are preserved at night.
(5) Maintain normal colour vision and allow the wearer
to distinguish traffic signals quickly & correctly.

6. STANDARD
• There are four categories of sunglasses lenses
listed in the ANSI Z80.3-2001
SUNGLASS AND FASHION
EYEWEAR.
• According to the ANSI Z80.3-2001
standard, the lens should have a UVB (280
to 315 nm) transmittance of no more than
one per cent and a UVA (315 to 380 nm)
transmittance of no more than 0.3 times the
visual light transmittance.

7. As of 2009, the European CE mark indicates that the glasses
actually offer a safe level of Sun protection

8. (1) A COSMETIC LENS
 generally speaking this lens is more for
fashion than function.
Transmission of light is more than 40%

9. (2) A GENERAL PURPOSE LENS
[medium to dark]
 This is the category used for sunglasses
normally used by most individuals.
 Transmission of light is between 8% to
40%

10. (3) A VERY DARK SPECIAL PURPOSE LENS
[VERY DARK]
 This lens is appropriate for situations of very intense
light , such as for mountain climbing.
 Transmission of light is between 3% to 8%.

11. (4) A STRONGLY COLOURED SPECIAL
PURPOSE LENS [ STRONGLY COLOURED]
 This type of lens might filter certain spectral colours
more heavily than others.
 Transmission of light is 3% is minimum.

13. Sunglass Tints
Grey Yellow or Gold
Amber or
Brown Green
Purple

14. Grey Tint
Great all-purpose tint
Good protection
against glare
Reduces
brightness with
the least amount
of distortion
Good for
driving and
general use

15. Green Tint
Filters some blue
light
Reduces glare
Offers the highest
contrast and
greatest visual
acuity
One of the most popular

16. Pink or Rose Tint
Best contrast of
objects against a
green or blue
background
They make a good
choice for hunting
or water skiing

17. Yellow Tint
Reduces the
amount of blue light
Allows a
larger
percentage of
other
frequencies
through
Makes everything
look bright and
sharp
Blue light can
create a glare
known as blue
haze

18. Amber or Brown Tint
Like grey, good general purpose
tints
Reduces glare
Contains molecules
that absorb higher
frequency colors,
such as blue and
UV rays
Distorts color
like yellow
lenses, but
increases
contrast and
clarity