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Ophthalmic and Mechanical Optics > Parts of EYEGLASSES > Flashcards

Parts of EYEGLASSES Flashcards

1
Q

glasses which are held in position before the eyes by means of sidepieces or temples

A

Spectacles

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2
Q

The front portion of the reading glasses where lenses are inserted and held in place

also referred to as rims

A

Eye Wires

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3
Q

small parts of the frame that extend outward from the lenses to connect the eye wires and the temples

A

End Pieces

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4
Q

The arched piece in the front, center of the frames that rests on the wearer’s nose and connects the eye wires.

A

Bridge

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5
Q
  • supports 90% of the weight of eyeglasses
  • plays a major role in determining fit for your frame
A

Bridge

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6
Q

Types of eyeglass Bridge:

A
  • Keyhole bridge
  • Saddle bridge
  • Adjustable bridge
  • double bridge
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7
Q
  • shaped like an old-fashioned keyhole and rests on the sides of the upper part of the nose
  • this style is for those with small or flat nose
A

Keyhole Bridge

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8
Q
  • shaped like a saddle and spreads the eight of the frame across the sides and the top of the nose
  • works well for heavy glasses/lens
  • for those who are sensitive to pressure
A

Saddle Bridge

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9
Q

includes nose pads that can be adjust for fit and comfort

A

Adjustable Bridge

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10
Q

has a reinforcing bar over the top of the bridge

A

Double Bridge

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11
Q
  • slightly flexible parts of the end pieces which allow the temples to fold inward
  • part of the frame that connects the frame front to the temples
  • allows temples to swing
A

Hinges

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12
Q
  • clear or tinted material placed inside the eye wires
  • designed to hold the wearer’s prescription or magnification
A

Lens

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13
Q
  • Small plastic pieces secured under the bridge that help keep the frame in its proper position
  • provides comfort and a snug fit
A

Nose Pads

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14
Q
  • attachments that hold the nose pads in place
  • allows room for adjustment so the glasses fit the wearer’s natural face shape
A

Pad arms

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15
Q
  • Tiny metal fasteners found at hinges
  • used to connect the end pieces to the temples
  • sometimes these are found on the bridge to hold nose pads in place
A

Screws

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16
Q

Bar found above the bridge that connects the two eye wires

provides extra weight-bearing support

not found on all styles of glasses

17
Q

long arms on the sides of the frame that extend over the ears to keep the glasses on the wearer’s face

18
Q

Types of eyeglass Temples:

A
  • Skull temples
  • Comfort-cable temples
  • Riding bow temples
  • Spring-hinged temples
  • Library or paddle Temples
19
Q
  • are the most popular temples for plastic frames
  • bent down slightly over the ear and follow the contour of the skull
A

Skull Temples

20
Q
  • has hook behind the ear with a flexible metal cable
  • good for children’s glasses
  • good for sport safety glasses
A

Comfort-Cable temples

21
Q

similar to comfort cables, except they are rigid and made of plastic

A

Riding bow temples

22
Q
  • include hidden springs in the hinges that help keep the frame from slipping
  • more expensive
  • more resistant to breakage
A

Spring-Hinged temples

23
Q
  • are straight so they can be slipped on and off easily
  • often used in reading glasses
A

Library or Paddle temples

24
Q

plastic coverings that cover where the temples rest behind the ears

They provide extra comfort to the wearer especially on glasses with metal frames

A

Temple Tips or Earpiece

25
Q

a point on the lens where the line of sight passes

also known as the Visual Point

A

Wearing Point

26
Q
  • the flat or angled surface
  • usually the fine ground
  • limits the refracting surface of a lens
27
Q

the frontal outline of the lens

28
Q

is the difference between the horizontal and vertical diameter of the lens

A

Pattern of the Lens

29
Q

is the displacement of optical center (O.C) from the wearing point or mechanical center

A

Decentration

30
Q

purposes of decentration:

A
  • to produce desirable prismatic effect
  • to avoid or eliminate undesirable prismatic effect
31
Q

a device used as a guide for cutting the lens in order to obtain the desired shape

32
Q

Kinds of Former:

A
  • Hand former
  • Mechanical Former
  • Symmetrical formers
  • Asymmetrical formers
33
Q
  • formers usually made of cardboard
  • transparent celluloid or thin sheet metals
  • suitable for cutting odd shaped lenses
A

Hand Former

34
Q

former used for automatic cutting machines

A

Mechanical former

35
Q

a former having a similar and uniform shape on both temporal and nasal sides

A

Symmetrical Former

36
Q

former in which the temporal and nasal sides are dissimilar

A

Asymmetrical Former

Ophthalmic and Mechanical Optics (10 decks)

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