Tools Flashcards
Adjustment tools
- Nose pad pliers
- Single/double nylon jaw pliers
- axis adjustment pliers
- needle nose pliers
- screwdriver sets
- drill mount kit
- pupilometer
- hot air frame warmer
Pupilometer
Measures PD
Can be set at different distances
Not good for tropias or someone with a facial deformity
Hot air frame warmer
Adjust plastic frames
Hot and cold
Ultrasonic cleanser
Cleans glasses and jewelry
High frequency pressure
-Should not put AR coating lenses in the ultrasonic cleansers
-coatings are very dense so water can be absorbed within the film if it is left in too long and cause it to loose adhesion and color shifts in the lens
Traditional surfacing
Rx is ground and polished into a lens using a pre made tool for the given Rx
Must stock semi finished progressive lens and bifocals and add power
Digital surfacing
Ability to tailor to suit an individual prescription
More options
Surfacing equipment
Axis marker Blocker Generator Finer Polisher Coater
Measures the dioptric power of lens
Lens clock
How to calibrate the lens clock
Place it on flat surface, should read 0
Error in a lens clock
If you are not completely perpendicular, even just 10 degrees off will cause an error of 2D
What is the red readings on a lens clock
Back surface
What is the black numbers on a lens clock
Front surface
What is a lens clock designed for
Materials like glass with an index of 1.53
-any other RI will cause an alter in the reading
When rotating the lens clock on the front surface of a lens, all meridians read +3.00D. When rotating the lens clock not he back surface, the clock reads -5.75D. What is the nominal power
Front=+3.00D
Back= -5.75
Nominal= -2.75
Checking a bifocal with a lens clock
Read the front surface on the top of the lens and then the front surface on the bifocal part, and take the difference
When rotating the lens clock on the front surface of a lens, all meridians read +6.50D. On the back surface the clock reads -7.50D along the 180 meridian and -6.00D along the 90 degree meridian. What is the nominal power of the lens
+0.50 -1.50 x 090
Measuring the thickness of the lens, good for inspections
Thickness calipers
What odo you measure the thickness on in the plus lens
Edge
What part of a minus lens do you measure the thickness
Middle
How do you decipher all the symbols on a progressive lens
Progressive lens identifier book
4 point alignment
Off-face
-sitting the frames on the table and making sure all 4 points touch the table and when you flip them upseide down they should do the same
How to start adjustments
Always start from front and center, and work your way around and out
X-in
Vertical misalignment
Temporal spread
Temples should be almost perpendicular to the frame front, 90-95 degrees
Temple fold
Temples should fold parallel and symmetrical to each other and should cross at the center of the frame
Nose pads
- frontal, splay, and vertical
- tops of them should be closer than the bottoms, should follow the eye wire line
Faceform and wrap
Slightly rounded to the form of the face
Moving nose pads in
Lifts the frame up
Moving the nose pads out
Drops the frame
Fixing the temples
If the frame is too far down, move that same temple down to move it up and vice versa
Pantoscopic tilt
Lower rim tilted towards the face
4-18 degrees (usually 7-10 most commonly)
Retroscopic tilt
Bottom of frame angled out
Vertex distance/wrap
Make sure they are sitting even side to side from each eye
- affects horizontal displacement
- 12-14mm
- have them look down and look through the top of the glasses
- adjust the temples
Temple bend
Over the ear
Into the head
Most important 2 things
Full frame
Goes all the way around Sturdy Lens fits into a beveled edge Allows you to hide thick lenses Allows to get a thinner lens though Good for stronger lenses
Semi-rimless
Frame on top, wire on the bottom
Putting a groove into the lens and tightening the wire into it
Drill mount or 3 piece or rimless
Drilling into the lens to mount the frame
Very fragile
Not for strong RX
Can loosen easily if taking them on and off a lot
Very light weight
Inline frames
Hybrid of semilrimelss and a full frame
-acts like a semi rimless but goes into a full frame
Combination hybrid
Combination of materials
What material in frames contains nickel
Monel
What frame material contains copper
Monel
What is in hinges, inner core or temples
Nickel silver
Monel
Has nickel in it, so cannot give it to people with allergies
- Durable
- cheaper
- most common material
For allergie, what frame material is a good option
Titanium
Flexon
Trade marked
Very flexible
Titanium based alloy
Plastic frame material
ZYL Most common plastic frame Lower cost and allow for trendier looks Easier to break Sunlight can damage it
Some other materials
Silver Gold Wood Bone Horn Tortoise shell Leather Semi-precious and precious stones
Allergies to materials
Usually caused my nickel
They will request titanium frames if they already know
Sometimes they do not know and will come in with a reaction
Nose pads: some people are allergic to silicone.
