Question | Answer |
Who manufactures Boston Lenses? | Bausch & Lomb |
Who manufactures Fluoroperm lenses? | Paragon |
Which GP lens is FDA approved for 30 days continuous wear? | Menicon Z (menicon America) |
Most continuous wear lenses are FDA approved for __ days and ___ nights of continuous wear? | 7days
6 nights |
Explain DK of a lens and which allows more oxygen? Which is more fragile ? | DK= the amount of oxygen which passes through a lens material
more oxygen = more fragile |
What does the number represent in the following ; Fluoroperm 30, Fluoroperm 60, Fluoroperm 92, and Fluoroperm 151? | the DK value
30= low DK
151= high DK (more oxygen) |
List two soft lenses FDA approved for 30 days continuous wear? | 1.Alcon Air Optix night/day Aqua
2.B&L Purvision |
Explain ionic and non-ionic. Which deposits quicker? | ionic= attracts deposits quicker (more reactive material)
non-ionic= does not attract deposits as quick (less reactive material) |
Explain the difference between the suffix filcon and focon? | filcon= soft
focon=GP (hard) |
Soft Lens Group 1 | Low Water (<50% H20)
Nonionic Hydrogel Polymers |
Soft Lens Group 2 | High Water (>50% H20)
Nonionic Hydrogel Polymers |
Soft Lens Group 3 | Low Water (<50% H20)
Ionic Hydrogel Polymers |
Soft Lens Group 4 | High Water (>50% H20)
Ionic Hydrogel Polymers |
Soft Lens Group 5 | Silicone Hydrogel Polymers |
Lenses manufactured by B&L? | *soflens
*purevision
*optima
*biotrue
*silsoft
*kerasoft
*ultra |
Lenses manufactured by Alcon? | *dailies total 1
*air optix
*aqua comfort
*focus dailes
*fresh look |
Lenses manufactured by Vistakon/Johnson & Johnson? | *ACUVUE
anything acuvue |
Lenses manufactured by Cooper Vision? | *myday
*clariti
*biofinity
*proclear
*biomedics
*preference
*frequency
*hydrasoft
*avaira
*clearsight
*expressions
*vertex |
Alcon lenses were formerly manufactured by_________? | Ciba |
the original alcon lenses (minus focus dailies) have the letter CIBA lens markings where at on the lens? | in the periphery on the FRONT surface |
focus dailies by alcon have ___ lens markings? | NO LENS MARKINGS |
Fresh look colors disposable spherical & fresh look color dimensions disposable spherical lenses are stamped with was lens mark? | "FL" inversion mark |
Air Optix for Astigmatism lenses have CIBA7 plus two numerals molded into the lens_____? | periphery |
Bausch & Lomb lenses contain a _____type and a ____I.D mark? | Logo type
Series I.D pg.61 TQ |
all acuvue (johnson &johnson) spherical lenses have a 123 inversion on the ____ of the ____ surface of the lenses? | periphery
Front surface |
What is a Sclera Lens? | a large contact that rests on the sclera.
(know what it looks like) |
What is a Hybrid Lens? | a lens that has a GP center with a soft skirt .
(know what it looks like) |
Manufacture(s) of Hybrid lenses? | Synergeyes |
List lenses made by SynergEyes? | *Duette
*ultrahealth
*clearkone pg.60 TQ |
Explain water content of a contact lens? Which allows more oxygen? | lenses with less than 50 percent water content are considered to be low water and the others are high water.
High water=more oxygen=deposits more |
Manufactures of disposable Enhancement lenses? | *Advanced Vision Technologies
*Orlon Vision
*United Contact Lens
*X-Cel Specialty Contacts |
Disposable ENHANCEMENT lenses made by Advanced Vision Technologies? | AVT COLORED LENSES |
Disposable ENHANCEMENT lenses made by Orlon Vison? | Orion enhancers
Bio tint |
Disposable ENHANCEMENT lenses made by United Contact Lens? | UCL enhanced tints |
Disposable ENHANCEMENT lenses made by X-Cel Specialty Contacts? | HORIZON TINT |
Manufactures of disposable Opaque lenses? | *Orion Vision
*United Contact Lens |
Disposable OPAQUE lenses made by Orion Vision? | *venus
*impressions
*color max
*equinox
*bella
*biocolors |
Disposable OPAQUE lenses made by United Contact Lens? | cool eyes |
Upperlid Attachment (Alignment Fit) Avgerage Diameter? | 9.5 |
Intrapalpebral Fit (Apical) Average Diameter? | 8.5 |
Upperlid attachment has a ___ base curve? | Flat BC |
Intrapalperbral fit has a _____ base curve? | Steep BC |
PMMA and Fluorosilicone Acrylate are terms used to describe what type of lenses? | GP lenses |
hydrogel,filcon, and silicone hydrogel are terms used to describe what type of lenses? | Soft lenses |
Know how to select the correct contact lens power without using your calculator for VD. | page 247 in CL book
page 68 in TQ |
selecting base curve and power of soft CL | BC is in .25 diopter steps
(know how to do spherical equivalence) |