PD-NB/2
ANSWER-FRAME SIZE X 2
ADD 1 MM FITTING ALLOWANCE
Example
frame size = 52
nose bridge = 19
PD = 62
then
62-19/2
Type: Posts; User: Lab King; Keyword(s):
very simple formula
PD-NB/2
ANSWER-FRAME SIZE X 2
ADD 1 MM FITTING ALLOWANCE
Example
frame size = 52
nose bridge = 19
PD = 62
then
62-19/2
How to make telescope
how can i make a telescope with ophthalmic lenses
I have upto +20.00 or -20.00 lenses
can any one tell me what power is required and the distance between 2 lenses
Yes the problem is same.
i have a problem with my coburn 2113 generator screen disappear and not moving the right way plz help me..
we are interested in frames just tell your location and send us some pics
it should be with guarantee
laiqahmedkhan97@hotmail.com
We need semi finished blanks uncoat and one side multicoated
Looking for distributor in Asia for optical lab consuambles
if still for sale plz send pics mk_9888@hotmail.com
plz send details mk_9888@hotmail.com
got one
i need thickness formula to find out thickness acording to size for plus power lenses