care of ophthalmic lenses part 1

1. By Afaf Jauhar

2.  Introduction
 Purpose of Ophthalmic lenses
 Types
 Spectacles
 How to take care of ophthalmic lenses
 Materials required for cleaning
 Cleaning procedure
 Additional Instructions
 Summary

4.  Lenses are transparent objects that bend or
refract light..
 Ophthalmic lense is a lens used for correcting
vision in person with visual impairments
(where the focal length of the eye doesn’t hit
the retina).

5.  Refractive error correction (myopia, hyperopia
etc)
 Protection from injuries
 Occupational wear
 Protection from harmful rays
 For cosmetic purposes
 Protection from glare by night drivers

6.  Come in a variety of form
 Plastic/Glass Lenses worn in glasses..
 Contact lens placed in a direct contact with
eye

7.  Two lenses in a frame that rests on the nose
and ears (Oxford learning dictionary)

8.  Single vision lenses, which provide correction
for only one distance (that is for far or near)
 Multifocal lenses (bio-focals, trifocals and
progressive-addition lens), which combine
two or more corrections in a single lens to
provide sharp vision at more than one
distance.

9.  According to research of CBS in 2013 more
than 6 in 10 people are spectacles or contact
lens wearers.
 The Vision Council of America's claim that 64
percent of people wear glasses.

10.  Lens gets scratch easily and scratches can
cause visual difficulties
 Cleaning is necessary in terms of hygiene
 Clear vision
 We can use them for long time if given proper
care

11.  Scratch resisting coating
 Proper cleaning
 Additional instructions

12.  Scratch resistant lenses are made by coating
regular plastic or glass lenses with a hard
protective layer. This coating is applied to the
front and back of the lenses.
 Many eyeglass lenses today are treated with
scratch-resistant coating during the
manufacturing process.

14.  Unfortunately, 80% of lens scratches occur by
cleaning eyewear incorrectly

15.  Water
 Lens wipes
 Microfiber cloth
 Rubbing alcohol

17.  Lens cleaner: a solution of isopropyl alcohol.
 Microfiber cloth: it is a special type of cloth
required for wiping glass lens.
 Eye glass screw driver: it is used for fixing the
nose pads.

18.  Wash and dry hands
thoroughly
 Rinse glasses under a
gentle steam of
lukewarm tap water
 Apply small drops of
solution to each lens
 Gently rub both sides
of the lenses and all
parts of the frame for
a few seconds.

19.  Rinse both sides of the
lenses and frame
under running,
lukewarm water
thoroughly.
 Gently shake the
glasses to eliminate
most of the water from
lenses.

20.  Carefully dry the
lenses and frame
with a clean,
microfiber cloth
 Inspect the lenses
again

22.  For reasons of hygiene, it is recommended
too clean the sides of the frame and the nose
pads time to time

23.  Always keep them in a case when not in use.
 If case is not available place them in a safe
spot, with the lens facing upwards
 Take the glasses off using two hands instead
of one
 Additionally, never leave your eyeglasses
facing down
 Do not expose glasses to extreme heat.

24.  Though not given proper attention, but
cleaning and caring of spectacles and lenses
is an important task
 In the era where we emphasize vision
spectacles need to be given proper care
 Therefore, we must be conscious and aware
to keep our spectacles clean and disturbance
free.

26. Q1: Best option for cleaning spectacles
 Bleach
 Saliva
 facial towel
 Your shirt
 Non of the above