Contact lens 2

Question 1

what are the types of contact lenses?

Answer 1

. soft contact lenses

. rigid lenses

Question 2

what materials make soft lenses?

Answer 2

. hydrogels

. silicone hydrogels

Question 3

what is the modality of soft lenses?

Answer 3

. daily
. 2- weekly
. mnthly
. annual

Question 4

what type of material make rigid lenses?

Answer 4

. PMMA

. RGas permeable

Question 5

what is the modality of rigid lenses?

Answer 5

. annual

Question 6

what are contact lenses DO?

Answer 6

. have regular check-up
. wash hands prior to using
. always rub, rinse and store contact lenses in recommended solution
. avoid mixing lenses up
. check lens is not inside out before applying
. handle carefully to avoid damaging
. apply lenses before makeup
. remove lenses before makeup
. keep eyes closed when using hairspray
.replace lens case regularly

Question 7

what are contact lenses don’t?

Answer 7

. use tap water on lens or lens case
. sleep in lenses 
. use lenses for swimming . hot tub
. wet lenses with saliva
. share lenses
. put lenses on eye if it falls on floor without cleaning again
. wear lenses while showering
. switch solution
. apply lens if dirty
. continue to wear if eyes don't feel good

Question 8

why do contact lenses need to be clean?

Answer 8

. build up of deposits
e.g lipid - silicone hydrogel
. discomfort
. hypersensivity (allergy)
.infection risk

Question 9

what are Acanthameba?

Answer 9

. protozoa found in environment
. soil , air , seawater , tap water , swimming pool
. contact lens case

Question 10

what are symptoms of Acanthamoeba keratitis?

Answer 10

. sensitivity to light
. red eye
. painful
. reduced vision
. can progress within days to weeks
, may lead to permanent loss of vision

Question 11

what are examples of soft lenses solution?

Answer 11

. multipurpose solution

. hydrogen peroxide

Question 12

what is the function of multipurpose solution?

Answer 12

. simple and convenient
. cleaning , disinfecting , storing
. clean, rub , rinse , store

Question 13

what is the function of hydrogen peroxide solution?

Answer 13

. no reaction to preservations

. metallic disc to neutralise the disinfectant before wear

Question 14

what are examples of RGP lenses solution?

Answer 14

. abrasive cleaner

Question 15

function of abrasive cleaner?

Answer 15

. remove lipid and mucus

. can enhance the disinfecting action of soaking solution

Question 16

describe insertion and removal of contact lenses to new wearer ?

Answer 16

. don’t be nervous
. touching lens not eye
. hold lashes
. lens applied to cornea- coloured part of eye
. once lens touches eye don’t blink straight away
. look up , down , left , right
. let go of lashes slowly
. removal - slide lens part off cornea and pinch lens of sclera