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CONTACT LENS > Random CL questions > Flashcards

Random CL questions Flashcards

1
Q

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

A

PMMA

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2
Q

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

A

Lubricants / Lubricating Drops

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3
Q

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

A

RGP

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4
Q

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

A

Hydrogel CL / Soft Contact Lens

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5
Q

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

A

Toric Contact lens

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6
Q

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

A

Base Curve

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7
Q

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

A

Disposable contact lens

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8
Q

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

A

Extended / Continuous Wear

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9
Q

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

due to increased evaporation of the existing tear film

A

Dry Eyes Syndrome

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10
Q

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

recommended for use either daily, weekly, or monthly

A

Enzymatic Cleaner

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11
Q

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

A

Contact lens

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12
Q

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

A

Fluorescein strip/dye

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13
Q

Also called planned replacement

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

A

Frequent Replacement CL

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14
Q

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

A

Hybrid Contact Lenses

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15
Q

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

A

Slit-Lamp

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16
Q

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

A

dk/t, Oxygen transmissibility

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17
Q

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

A

Surfactant Cleaners

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18
Q

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

A

Superior Epithelium Arcuate Lesion

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19
Q

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

A

CLARE

due to staphylococcus

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20
Q

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

A

CLRU - Contact Lens Peripheral Ulcer

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21
Q

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

A

Polymegathism

22
Q

it is known as epithelial splitting

A

SEAL

23
Q

black non-reflecting areas in the endothelial mosaic

A

Corneal/Endothelial Gluttata

24
Q

most common deposit on hydrogel lenses

A

Protein

25
Q

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

A

Thimerosal

26
Q

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

A

Sorbates

27
Q

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

A

John Herschel

28
Q

He developed a thinner, more lightweight contact lens

Its tiny design afforded more comfort and longer wearing time

A

Kevin Tuohy

29
Q

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

A

Otto Wichterle

30
Q

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

A

Cosmetic / Colored contact lens

31
Q

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

A

CL house / CL case / CL container

32
Q

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

A

Disposable daily contact lens

33
Q

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

A

Handling tint / Visibility Tint

34
Q

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

A

Soft CL

35
Q

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

A

Acanthamoeba Keratitis

36
Q

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

A

Corneal Edema

37
Q

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

A

Corneal Ulcer

38
Q

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

A

Fenestration

39
Q

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

A

Fluorescein Pattern

40
Q

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

A

GPC

41
Q

collections of white blood cells and lymphocytes in the cornea.

Causes include viral infection, hypoxia, and solution sensitivity

A

Infiltrates / band keratopathy

42
Q

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

A

Keratitis

43
Q

an inflammation involving both the cornea and the conjunctiva

A

Keratoconjunctivitis

44
Q

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

A

Lysozyme

45
Q

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

A

Neovascularization

46
Q

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

A

Optic Zone

47
Q

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

A

Pseudomonas Aeruginosa

48
Q

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

A

Sagittal Depth, SAG DEPTH

49
Q

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

A

Punctate Staining

50
Q

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

A

SERRATIA MARCESCENS

CONTACT LENS (10 decks)

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