Frame parts and materials by Sumayya Naseem
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Transcript of Frame parts and materials by Sumayya Naseem
![Page 1: Frame parts and materials by Sumayya Naseem](https://reader035.fdocuments.in/reader035/viewer/2022062905/546f32f3af7959685b8b4e24/html5/thumbnails/1.jpg)
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FRAME PARTS &
MATERIALS
BY:
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FRAME (OPHTHALMIC, SPECTACLE)
A device for holding ophthalmic lenses in the proper position on the head, in front of the eyes.
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FRAME
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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.
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FRAMES
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PARTS OF A FRAME
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PARTS OF A FRAME• A frame typically consists of:
A front (it holds the lenses)A BridgeA pair of temples (ear pieces)Nose pads
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PARTS OF A FRAME
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FRONT• A component of an ophthalmic
frame, consisting of a bridge and eyewires.
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BRIDGE
• The supportive structural member connecting the two eye wires of an ophthalmic frame.
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BRIDGE
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REGULAR BRIDGE
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SADDLE BRIDGE
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EYEWIRE GROOVE
• The recessed area of an eyewire, in which the lens edge is seated, is called eyewire groove.
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EYEWIRES
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HINGES
Part of the hardware of the frame
Hinges attach temples to frame front.
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HINGES
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SCREWS
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NOSEPADS
Are available in variety of sizes.
In fixed and adjustable forms.
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NOSEPADS
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TEMPLES
Also known as ear pieces.Fix the unit to the head.Have many types.
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TEMPLES
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TEMPLE TYPES
Library TemplesRiding bow TemplesSpatula TemplesCable TemplesHeadband Temples
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TEMPLE TYPES
Library Temples: The style of temple that has
almost no bend over the ear, originally designed for ease of removal.
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LIBRARY TEMPLES
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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.
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RIDING BOW TEMPLES
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TEMPLE TYPES
Spatula Temples
Fit over the ear.Can be fixed or adjustable.Available in plastic and metal.
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SPATULA TEMPLES
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TEMPLE TYPES
Cable Temples
Fit over the ear.Can be fixed or adjustable.Available in plastic and metal
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CABLE TEMPLES
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TEMPLE TYPES
Headband Temples
Are easily adjustable for a secure fit.Are useful for tasks requiring movement.
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HEADBAND TEMPLES
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FRAME RIMS
Full Rim Semi rimless Rimless
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FULL RIM
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SEMI RIMLESS
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RIMLESS (THREE PIECE)
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COMPARE
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FRAME MATERIALS
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FRAME MATERIALS
☺Metal ☺Plastic ☺Tortoise shells ☺Wood☺Combination (plastic and metal)
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METAL FRAMES
Commonly used metals are:
۞Aluminum۞Nickel silver۞Titanium۞Stainless Steel۞Cobalt & Beryllium
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ALUMINUM
Stain resistantDurableLight weightPaintableStrong & rigidHeat conduction
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ALUMINUM FRAME
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NICKEL SILVER
60% Copper & 20% NickelNo SilverRigid
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NICKEL SILVER FRAME
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TITANIUM• Light weight• Flexible• Abberation resistant• Passed the artificial sweat rust
test • Expensive & Colors are limited
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TITANIUM FRAME
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STAINLESS STEEL
DurableFlexibleStrongNon magneticResistant to oxidationEndless color range
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STAINLESS STEEL FRAME
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COBALT
DurableFlexibleLight WeightMany colorsRelatively Expensive
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BERYLLIUM
HardLight WeightStrong
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PLASTIC FRAME MATERIALS
Cellulose AcetateCellulose NitratePolymide (A nylon)
Acrylic (occasionally used)
Carbon fiber (added to frames to give strength and light weight)
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CELLULOSE ACETATE, ZYL
• Most commonly used• Can be produced faster than other
plastic frames• Is more colorfast.
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ZYL
FRAME
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CELLULOSE NITRATE
Tougher than Cellulose Acetate.Thinner frames.Harder surface, so easy to polish.Easier to work on.Better dimensional stability.
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CELLULOSE NITRATE FRAMES
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POLYMIDE (A NYLON)
DurableLess weightFlexibleMany colors and designs
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NYLON FRAME
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PROPERTIES OF PLASTIC FRAME MATERIALS
Dimensional StabilityColorfastnessMechanical durabilityGood thermal – electrical insulationHigh resistance to chemicalsEase of production
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TORTOISE SHELL FRAMES
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WOODEN FRAMES
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COMBINATION FRAME
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