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71 Cards in this Set
- Front
- Back
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OPL |
Have little to no distance vision Power comes in digressions Has a large intermediate zone Accounts for Computer viewing which is around 20 degrees |
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Computer progressive lens Vs Enhanced Single vision |
Enhanced single vision has NO distance Rx *also has a larger intermediate zone * only small power changes, little surface astigmatism |
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Zeiss office lenses |
These distribute the int and near zone over the entire lens This offers patients large field of clear int and near vision |
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Single Layer AR coating |
*only treat 1 wavelength (555) * Does not account for Obl Rays *n of most coating are too high to meet the amplitude condition |
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Multi Layer AR coating |
*better performance across visual spectrum * Transmittance is over 99% * alternates high and low induce layers accounting for all aspects of the lens * Most are proprietary |
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Multilayer AR coating |
Generally are attached on a Scratch resistance Coating for better adhesion Generally topped with * Quartz- hydrophilic, can attach debris and show smudges * Silicone- Lipophilic, improved cleaning, may require an anti static coating ***good AR lenses will show everything!! |
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Pros for AR coatings |
*clear and crispy vision *less eye strain and HA *better night vision * lenses look thinner |
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Cons for AR |
*make every defect visible (smudges or scratches) *bad for people with prosthetics or trauma |
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Old vs new frames? |
Make sure they sign the waver if they want new lenses in old frames. *metal frames get poor joints while plastic frames dry and crack over time |
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TRIANGLE |
Goal is to widen width of the forehead Frames -slightly wider than the jaw - frame with heavy color or detailing on the top Square shapes |
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Inverted Triangle |
Goral is to broaden the chin and minimize the forehead width AVOID top heavy frames |
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Diamond face |
Goal is to widen the forehead and the chin while minimizing cheek bones Pick Top heavy frames AVOID decorative temples |
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Color selecction |
**Skin tone is the primary driver for color selection** Cool complexion= blue or pink undertone Warm complexion= yellow undertones Olive skin tone= cool or warm colors |
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Frame Color |
Dark frames draw attention to the surroundings Ppl with smol and delicate faces need a lighter frame color Narrow set eyes need to have a light color bridge and distinct upper temporal area To Lengthen a nose select a Key hole bridge |
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Zyl |
Started as Cellulose Nitrate but changed to Cellulose Citrate FDA D/C the nitrate Zyl name still stayed |
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Zyl vs Cellulose Citrate propionate |
CCP is better, lighter and can have lenses put in cold with little to no heat HYPOALLERGENIC |
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Metal frames now |
Make with metal alloys or complete metal (Titanium) Electrolyte treatment makes them corrosion resistant |
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Nickel based frames |
bendable and affordable ALLERGY |
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Stainless Steel |
Iron, Manganese, NICKEL and chromium alloy Thin and lightweight corrosion or tarnish resistance
*Difficult to adjust, brittle with hot temps |
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Rules of frame selection |
*fit the widest part of skull first * the longer the face, the greater the vertical depth in the frame they need * Dark colored frames SHORTEN a long face. * Lower frame lines can add lift to a face and hide bags under the eyes |
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Aluminum |
Low density and lightweight Corrosive resistant *NO flexibility, does not solder well requires screws and rivets to assemble |
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True or false, Titanium alloys may cause Allergies ? |
True |
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Memory Metal (Flexon) |
Metal returns to shape, lightweight, HYPOALLERGENIC -durable and good for young kids *Expensive and hard to adjust |
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Plastic vs Metal |
*high minus edges better with plastic *high plus look better in Metal Plastic has a LOT of options (Metal has adjustable nose pads ) (Metal has rimless or semirimless) |
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Roll and Polish |
Roll= grind off thickness on the back edge surface Polish= removes the surface marking with roll **MUST HAVE AR COATING TO AVOID INTERNAL REFLECTION* CAN ADD COLOR TO RIMLESS OR SEMIRIMLESS |
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CAN you perform roll and polish in office? |
YES |
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How do we handle high Myo lenses? |
Plastic Small eye size High index , Roll and Polish ARC LENTICULAR DESIGN |
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What type of design should we use for a High Myope |
Lenticular design |
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Lenticular designs |
D |
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Dark colored frames can do what to a face? |
*Shorten a longer face *Revert attention away to other portions of the face |
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Proper frame selection |
*DONT project your personal style choices on your patient * Consider frame-dimension,color and Shape * CONTRAST THE SHAPE OF THE FACE* |
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What is the GOLDEN RULE of frame selection? |
Contrast the shape of the face |
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Face types |
Oval- IDEAL Oblong Round Square Triangle Inverted triangle o heart Diamond |
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Oval face types |
Just try and balance the oval *can wear any type of frame |
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Oblong (Ryan Gosling) -narrow cheeks |
*pick frames that break the length of the face* -frame extends beyond the widest part of the face *wrap around frames or oversized frames* Want deeper frames with low temple attachments and a low bridge to shorten the nose |
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Round face (Leonardo) |
Goal is the make face look longer and thinner *use square and rectangle shapes Higher temple attachments |
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Square Face (Brad Pitt) |
Goal is to make face longer and balance out the jawline *round oval curved frames * cat eyes or semirimless **FRAMES NO WIDER THAN FACE** |
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When fitting frames, what should you do? |
Start with the bridge and then suggest something opposite of their face shape *Round face, give them a square frame |
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Splay angle |
Angle of the nose flaring anteriorly Poor splay angle could cause the nose piece to it into the nostrils |
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Crest Angle |
Angle from the base of the nose up to the area between ur eyes |
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When fitting frames, what is the standard method of alignment |
“BET” Bridges Endpieces Temple |
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What was the outcome to the CAKE study? |
Kids perceived other kids with glass as smarter |
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Fitting specs on kids |
Don’t give them too big of glasses expecting them to grow into them. **the frame should allow to grow, should not be no wider than the widest part of the face and the lens decentration should never be over 5mm |
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Fitting principles for kids |
Get a solid fitting triangle *keep weight off the cheeks Temples go straight back *contact should only be on the ears Eyes should be centered vertically and horiz Eye size should be large enough to avoid temple flare |
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What shape of frames are tough to fit on kids? |
Rectangles because they have a narrow DBL |
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What fit is crucial for young kids? |
Bridge fit (Remember we can’t give them nose pads due to choking hazards) |
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What kind of temples do infants need? |
Elastic straps and headbands |
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Is Flexon good for kids? |
Yes, its light durable and snaps back into shape It’s also hypoallergenic |
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Why are polyamide frames a bad choice for Houston? |
Because they shrink when you place them in the heat. |
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Tomato frames |
Plastic and metal HAVE NOSEPADS Have skull temples with headbands |
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Why are Mira flex not the best options? |
hard to fit LASH CRASH Fogging Lens can pop out |
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SPECS 4 US |
Designed for Down Syndrome and other special needs Made out of Titanium Have sun clips and 3D movie clip ons |
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What cosmetic condierations should you have when fitting kids? |
Let kid pick the color (Bright colors can draw attention away from thick lenses) Keyhole makes nose appear longer Larger B dimensions to make face shape shorter |
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Things you should avoid when fitting kids |
Rimless or semi-rimless Metal for kids under 3 Any lens material that is NOT poly |
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Rec specs |
Thicker plastic frames for impact POLY or TRIVEX NOT REGULATED BY ANSI STANDARDS ***USE ASTM f803 standard |
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Nerdwax |
Can be applied to nose pad to help prevent slippage Removes EZ with soap and water
**might not be able to use with sunscreen, could cause and allergy too** |
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Tints and coatings for kids |
SCR are a must Only time we use comsmetic tints for kids is if we are treating a patient with photophobia conditions |
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Child compliance |
Older and myopic kids are more likely to be less compliant |
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How to promote compliance |
Make spec routine Start when kids are happy and rested Be positive Consider 2 pairs |
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What is interesting about Optyl frames? |
They are made out an epoxy material which lets them heat up and mold and then reform back into what it was originally. Disadvantage is that it can warp when heated |
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How much more energy does the Military impact resistance have over regular impact? |
Approx 7 times more |
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Do frames and Shells have to go through the penetration test? |
No only the lenses do |
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True or false, Z87.01 cover against lasers? |
NO lasers have their own standards |
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Face shields |
These are secondary eye protection and must be warn with the other primary eye protection |
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Why do we tint the edges of High Myope lenses? |
To reduce the amount of internal reflection |
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Myodisc |
Will have a flat front THE CARRIES WILL ALWAYS BE PLANO!!!! |
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What will myodiscs have |
Flat front curve Plano carriers |
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Why do we use Lenticular or myodisc? |
We are trying to reduce the edge thickness for the patients |
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When fitting nose in frame what do you need to fit first? |
Adjust for Pantoscopic tilt 1st |
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What are the three angles needed for nose fittings? |
Splay angle Crest angle Frontal angle |
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Frontal Angle |
Angle of the nostrils Make sure to pick the appropriate DBL |
