Contact Lens Manual Flashcards
(45 cards)
The individual awarded the first patent
for a corneal lens made of PMMA was:
a) Da Vinci
c) Fick
b) Tuohy
d) Soper
b) Tuohy
Until the 1930s, all contact lenses were
made of:
a) plastic
c) gelatin
b) glass
d) CAB
b) glass
Polycon I, the first silacrylate lens, was
developed by:
a) Tuohy
b) Wichterle
c) Wesley
d) Seidner
d) Seidner
The biggest disadvantage of PMMA as a
contact lens material is its lack of:
a) color
b) stability
c) gas permeability
d) optical clarity
c) gas permeability
Bifocal contact lenses have been marketed
in the U.S. since which decade of
the twentieth century?
a) fifties
b) sixties
c) seventies
d) eighties
a) fifties
From the 1930s through the 1960s, the
material of choice for contact lenses was:
a) FSA
b) CAB
c) PMMA
d) HEMA
c) PMMA
The first company to market soft lenses in
the U.S. was:
a) Bausch & Lomb
c) Schott
b) Syntex
d) Obrig
a) Bausch & Lomb
One-day disposable soft lenses became
available in:
a) 1938
b) 1950
c) 1971
d) 1994
d) 1994
The first company to make contact lenses
of PMMA in the U.S. was:
a) Bausch & Lomb
c) Schott
b) Syntex
d) Obrig
d) Obrig
The company responsible for bringing the
soft lens material HEMA to the U.S. was:
a) Tillyer
b) National Patent Development Corp.
c) Bausch & Lomb
d) Johnson & Johnson
b) National Patent Development Corp.
The contact lens pioneer who made
improvements to lens design by inventing
the topogometer to better measure corneal
topography was:
a) Dallos
b) Wichterle
c) Soper
d) Becker
c) Soper
The person considered responsible for
first realizing the concept of corneal
neutralization and replacement by a
“lens” placed in contact with the eye is:
a) Da Vinci
c) Fick
b) Tuohy
d) Soper
a) Da Vinci
The Food and Drug Administration has
been involved in approval of new contact
lens materials since the year:
a) 1950
b) 1968
c) 1971
d) 1978
b)1968
Rigid gas permeable (RGP) contact lenses
have been marketed in the U.S. since
which decade of the twentieth century?
a) fifties
b) sixties
c) seventies
d) eighties
c) seventies
The chemist who invented HEMA is:
a) Dallos
b) Wichterle
c) Soper
d) Becker
b) Wichterle
Which layer of the cornea makes up 10%
of the structure’s total thickness?
a) epithelium
b) Bowman’s membrane
c) endothelium
d) stroma
a) epithelium
The vertical measurement of the palpebral
fissure for an average eye is
__ mm
a) 5
b) 10
c) 15
d) 20
b) 10
The eyelid muscle responsible for closure of the lids is the:
a) dilator pupillae
b) orbicularis oculi
c) levator superioris
d) pectoral blephari
b) orbicularis ocul
The anterior cornea’s main source of oxygen is the
a) atmosphere
b) short posterior ciliary arteries
c) fovea
d) leukoma
a) atmosphere
A dense opacity of the cornea is called
a) dendrite
b) nebula
c) fovea
d) leukoma
d) leukoma
The goblet cells that secrete mucous into the
tear film are located in which structure ?
a) ciliary body
b) retina
c) conjunctiva
d) tarsal plate of the eyelid
c) conjunctiva
The transition zone between the bulbar conjunctiva and the palpebral conjunctiva is called the
a) fundus
b) blend
c) limbus
d) fornix
d) fornix
The middle layer of the three main layers
of the globe is mostly responsible for:
a} nutrition
b) light sensitivity
c} protection
d} ocular motility
a} nutrition
Pupillary constriction is called:
a} cycloplegia
b} esophoria
c} miosis
d} mydriasis
c} miosis
