Determining Lens Blank Size

0.0(0)
studied byStudied by 1 person
0.0(0)
full-widthCall with Kai
learnLearn
examPractice Test
spaced repetitionSpaced Repetition
heart puzzleMatch
flashcardsFlashcards
GameKnowt Play
Card Sorting

1/9

encourage image

There's no tags or description

Looks like no tags are added yet.

Study Analytics
Name
Mastery
Learn
Test
Matching
Spaced
Call with Kai

No study sessions yet.

10 Terms

1
New cards

lens blank

the lens before it has been edged for a frame

2
New cards

finished lens blank

lens that contains rx powers & needs to be edged

3
New cards

semifinished lens blank

lens that has only one side of lens finished, usually the front; the back still needs to be ground & polished to the correct power

4
New cards

PDs

what determines the position of the OCs & size of finished lens blank?

5
New cards

frame ED

the lens blank diameter = what?

6
New cards

2mm, 1mm

if decentration is needed _____ is added to the ED for every ____ of decentration of the lens

7
New cards

ED + 2(decentration per lens) + 2

(per lens one) MBS =

8
New cards

((A+DBL)-PD) / 2

decentration per lens =

9
New cards

(A+DBL) - PD

total decentration =

10
New cards

ED + total decentration + 2mm

(total decentration one) MBS =