CL Verification Flashcards
1
Q
What is CL verification
A
- confirm lenses match order
- make sure order is appropriate for rx
2
Q
Parameters to verify
A
- curvature
- central & peripheral
- diameter
- power
- thickness
- refractive index
3
Q
Why do we verify CLs
A
- maximise fitting success
- maximise profit
- ensure high standards
- determine source of problem
4
Q
When to verify CLs
A
- on receipt of cls
- during aftercare -warpage
- before reordering
5
Q
How to verify power of Rigid lens
A
- focimetry
6
Q
How to verify diameter
A
- v-slot gauge
- hand held magnifier
7
Q
How to verify lens thickness
A
- dial gauge
8
Q
How to measure the BOZR
A
- radiuscope - platform linked to a scale giving distance travelled in mm, uses drysdale theory
- keratometer - place lens on a prism, read curvature
9
Q
Edge profile verification - RGP
A
Instrument techniques
- projection magnifier
- ehrmann profilometer
- palm test
- radiuscope
- RGP edge moulding
10
Q
What is a toposcope
A
- measures BOZR and BPCR of RGP lenses
- measures spherical, toric and aspheric lens
