FRAME PARTS &

MATERIALS

BY:

FRAME (OPHTHALMIC, SPECTACLE)

A device for holding ophthalmic lenses in the proper position on the head, in front of the eyes.

FRAME

OPHTHALMIC FRAME

A frame for prescription or corrective lenses, intended for ordinary use, in correcting or improving vision.

Such a frame is not intended for occupational or safety use.

FRAMES

PARTS OF A FRAME

PARTS OF A FRAME• A frame typically consists of:

A front (it holds the lenses)A BridgeA pair of temples (ear pieces)Nose pads

PARTS OF A FRAME

FRONT• A component of an ophthalmic

frame, consisting of a bridge and eyewires.

BRIDGE

• The supportive structural member connecting the two eye wires of an ophthalmic frame.

BRIDGE

REGULAR BRIDGE

SADDLE BRIDGE

EYEWIRE GROOVE

• The recessed area of an eyewire, in which the lens edge is seated, is called eyewire groove.

EYEWIRES

HINGES

Part of the hardware of the frame

Hinges attach temples to frame front.

HINGES

SCREWS

NOSEPADS

Are available in variety of sizes.

In fixed and adjustable forms.

NOSEPADS

TEMPLES

Also known as ear pieces.Fix the unit to the head.Have many types.

TEMPLES

TEMPLE TYPES

Library TemplesRiding bow TemplesSpatula TemplesCable TemplesHeadband Temples

TEMPLE TYPES

Library Temples: The style of temple that has

almost no bend over the ear, originally designed for ease of removal.

LIBRARY TEMPLES

TEMPLE TYPES

Riding bow Temples:

A style of temples, in which it bends around the ear.

Useful for people, whose jobs are active, or for small children.

RIDING BOW TEMPLES

TEMPLE TYPES

Spatula Temples

Fit over the ear.Can be fixed or adjustable.Available in plastic and metal.

SPATULA TEMPLES

TEMPLE TYPES

Cable Temples

Fit over the ear.Can be fixed or adjustable.Available in plastic and metal

CABLE TEMPLES

TEMPLE TYPES

Headband Temples

Are easily adjustable for a secure fit.Are useful for tasks requiring movement.

HEADBAND TEMPLES

FRAME RIMS

Full Rim Semi rimless Rimless

FULL RIM

SEMI RIMLESS

RIMLESS (THREE PIECE)

COMPARE

FRAME MATERIALS

FRAME MATERIALS

☺Metal ☺Plastic ☺Tortoise shells ☺Wood☺Combination (plastic and metal)

METAL FRAMES

Commonly used metals are:

۞Aluminum۞Nickel silver۞Titanium۞Stainless Steel۞Cobalt & Beryllium

ALUMINUM

Stain resistantDurableLight weightPaintableStrong & rigidHeat conduction

ALUMINUM FRAME

NICKEL SILVER

60% Copper & 20% NickelNo SilverRigid

NICKEL SILVER FRAME

TITANIUM• Light weight• Flexible• Abberation resistant• Passed the artificial sweat rust

test • Expensive & Colors are limited

TITANIUM FRAME

STAINLESS STEEL

DurableFlexibleStrongNon magneticResistant to oxidationEndless color range

STAINLESS STEEL FRAME

COBALT

DurableFlexibleLight WeightMany colorsRelatively Expensive

BERYLLIUM

HardLight WeightStrong

PLASTIC FRAME MATERIALS

Cellulose AcetateCellulose NitratePolymide (A nylon)

Acrylic (occasionally used)

Carbon fiber (added to frames to give strength and light weight)

CELLULOSE ACETATE, ZYL

• Most commonly used• Can be produced faster than other

plastic frames• Is more colorfast.

ZYL

FRAME

CELLULOSE NITRATE

Tougher than Cellulose Acetate.Thinner frames.Harder surface, so easy to polish.Easier to work on.Better dimensional stability.

CELLULOSE NITRATE FRAMES

POLYMIDE (A NYLON)

DurableLess weightFlexibleMany colors and designs

NYLON FRAME

PROPERTIES OF PLASTIC FRAME MATERIALS

Dimensional StabilityColorfastnessMechanical durabilityGood thermal – electrical insulationHigh resistance to chemicalsEase of production

TORTOISE SHELL FRAMES

WOODEN FRAMES

COMBINATION FRAME