Random CL questions

Question 1

Old-fashioned hard contact lens material which is not oxygen permeable

Answer 1

PMMA

Question 2

eye drops designed to re-moisten and lubricate contact lenses while they are being worn, to increase comfort

Answer 2

Lubricants / Lubricating Drops

Question 3

Type of contact lens made of breathable plastic that is custom-fit to the shape of the cornea

Answer 3

RGP

Question 4

Contacts made of gel-like plastic containing varying amounts of water

Answer 4

Hydrogel CL / Soft Contact Lens

Question 5

a lens design with two different optical powers at right angles to each other for the correction of astigmatism

Answer 5

Toric Contact lens

Question 6

the main or steepest part of the curve used in the design of a contact lens

measured in millimeters

it is prescribed to match or complement the curvature of your cornea

Answer 6

Base Curve

Question 7

any contact lens that is thrown away after a short period of time

Answer 7

Disposable contact lens

Question 8

Contact lenses that can be worn during sleep

Some brands are FDA-approved to be worn without removal for up to seven days

Night & day and PureVision are approved for up to 30 days

Answer 8

Extended / Continuous Wear

Question 9

Chronic dryness due to reduced quality or quantity of the eye’s tear film

due to increased evaporation of the existing tear film

Answer 9

Dry Eyes Syndrome

Question 10

a cleaner that removes protein deposits and other debris from contact lens

recommended for use either daily, weekly, or monthly

Answer 10

Enzymatic Cleaner

Question 11

Small, thin removable plastic lens worn directly, on the front of the eyeballs

Answer 11

Contact lens

Question 12

compound that becomes a bright, fluorescent yellow-green when in contact with alkaline substances

Answer 12

Fluorescein strip/dye

Question 13

Also called planned replacement

any contact lens that is thrown away after a moderately short period of time

Answer 13

Frequent Replacement CL

Question 14

contact lenses that have a central optical zone made of rigid gas permeable plastic

surrounded by an outer “skirt” of silicone hydrogel or regular hydrogel material

Answer 14

Hybrid Contact Lenses

Question 15

Ophthalmic instrument producing a slender beam of light used to illuminate and examine the external and internal parts of the eye

Answer 15

Slit-Lamp

Question 16

the actual rate at which oxygen will pass through a specific contact lens of a given thickness

Answer 16

dk/t, Oxygen transmissibility

Question 17

it acts as a soap to remove debris. unbound proteins, lipid deposits and some microbial contamination

Answer 17

Surfactant Cleaners

Question 18

Arc-like lesions on superior corneal area due to higher lens modulus, lens design and material

Answer 18

Superior Epithelium Arcuate Lesion

Question 19

Acute inflammatory reaction with overnight wear of contact lens due to Gram-negative bacteria

Answer 19

CLARE

due to staphylococcus

Question 20

peripheral corneal round infiltrates due to inflammatory response to toxins of Gram-positive bacteria

Answer 20

CLRU - Contact Lens Peripheral Ulcer

Question 21

Changes in shapes of endothelial cells due to contact lens that do not transmit sufficient amount of oxygen

Answer 21

Polymegathism

Question 22

it is known as epithelial splitting

Answer 22

SEAL

Question 23

black non-reflecting areas in the endothelial mosaic

Answer 23

Corneal/Endothelial Gluttata

Question 24

most common deposit on hydrogel lenses

Answer 24

Protein

Question 25

it was one of the earliest preservatives to be used in contact lens solutions (it is a mercury compound)

Answer 25

Thimerosal

Question 26

is a natural substance found in fruits and berries it is used in the form of sorbic acid, as preservatives in most of the “sensitive eyes" solutions

Answer 26

Sorbates

Question 27

an english astronomer, who proposed the use of a small glass disk to fit over the eye to protect it from disease

Answer 27

John Herschel

Question 28

He developed a thinner, more lightweight contact lens Its tiny design afforded more comfort and longer wearing time

Answer 28

Kevin Tuohy

Question 29

he launched the concept of soft contact lens when he published “Hydrophilic gels for biological use”

Answer 29

Otto Wichterle

Question 30

a type of contact lens that can be used to change the “color of the eye”

Answer 30

Cosmetic / Colored contact lens

Question 31

a storage container used to clean and store daily wear contact lenses

Answer 31

CL house / CL case / CL container

Question 32

a single use contact lens you dispose of at the end of the day

Answer 32

Disposable daily contact lens

Question 33

lenses are slightly tinted to make them more visible for both care and insertion of the lens the tint on these lenses has no effect on eye color

Answer 33

Handling tint / Visibility Tint

Question 34

a corrective contact lens made from a mix of gel-like plastic polymers and varying amounts of water

Answer 34

Soft CL

Question 35

a rare but serious sight-destroying inflammation of the cornea caused by a parasite found in contaminated water

Answer 35

Acanthamoeba Keratitis

Question 36

swelling and fluid retention in the cornea, usually related to lack of sufficient oxygen in contact lens wearers

Answer 36

Corneal Edema

Question 37

a sight-threatening lesion, usually bacterial in nature and often causing permanent scarring of the cornea

Answer 37

Corneal Ulcer

Question 38

the drilling of tiny holes in a contact lens to allow tears to circulate more freely and to provide more oxygen to the cornea through the tear exchange

Answer 38

Fenestration

Question 39

the pattern formed by fluorescein-stained tears flowing under a rigid lens and observed with a Burton lamp or through the cobalt blue filter of a slit-lamp. This pattern shows the relationship between the lens and the cornea

Answer 39

Fluorescein Pattern

Question 40

an inflammation of the lining of the eyelids generally induced by the presence of denatured protein on the patient's contact lenses rubbing against the lids Symptoms of this auto-immune or allergic condition include itching, mucus secretion, foreign body sensation, lens clouding, and lens slippage

Answer 40

GPC

Question 41

collections of white blood cells and lymphocytes in the cornea. Causes include viral infection, hypoxia, and solution sensitivity

Answer 41

Infiltrates / band keratopathy

Question 42

an inflammation of the cornea that can be caused by mechanical irritation, solution sensitivity, allergy, infection or other disease process

Answer 42

Keratitis

Question 43

an inflammation involving both the cornea and the conjunctiva

Answer 43

Keratoconjunctivitis

Question 44

an antibacterial enzyme in tears that forms protein deposits on contact lenses

Answer 44

Lysozyme

Question 45

the ingrowth of abnormal blood vessels in the normally avascular cornea, often due to hypoxia in contact lens wearers

Answer 45

Neovascularization

Question 46

the central area of a contact lens within which the power is ground or molded

Answer 46

Optic Zone

Question 47

a bacterium that causes sight-threatening corneal ulcers, found more commonly in extended wear patients than in patients who remove and disinfect their contact lenses on a daily wear basis or who do not wear contact lenses

Answer 47

Pseudomonas Aeruginosa

Question 48

a measurement of the height of a lens, in millimeters, from a flat surface to the highest point of its curvature

Answer 48

Sagittal Depth, SAG DEPTH

Question 49

an abnormal stippling of the corneal epithelium that stains when fluorescein dye is instilled in the eye it may be caused by desiccation or infection

Answer 49

Punctate Staining

Question 50

a bacterial organism associated with infection in contact lens wearers. The organism has been found on lenses, in lens cases and in lens care solutions that have been mishandled by patients

Answer 50

SERRATIA MARCESCENS