we are manufacturer of optical pliers....and for our customers continuing education and guidance we try to collect....tips of the trade...here are some.

Removal of a screw from a metal frame, that wont seem to come out. 

Try to  heat it slightly in a salt pan, then turn it slightly to the right , and then to the left the screw will come out.

Frame adjustment when  glass lenses is not loose

Turn the eyewire screw or unscrew it before adjusting the frame and it  will be less likely to chip the lenses..

Did you cut a lens too small in a metal frame

How about "resizing" the frame by grinding down the end of the eyewire at the joint.

Temple is too long.

 Remove the temple tip, cut the desired amount off and replace the tip.

Removing and installing chord mounted rimless glasses.

Use our rimless hook VI 125 ………. to pull the line from the groove.

How do I know that a frame is straight

First thing you have to look at is to see if it is straight across the front.

If it is not, or if one side is bent in…….. more then the other, your 4 point stance means nothing.

Quite often you will see frames come in with one temple up and one down and almost invariably the patient will tell you they have one ear higher then the other. For the most part this is a crock. Scientifically it is a fact. In reality the difference in most cases is miniscule. Check the front of the frame and you will probably find……………………………………………………………………. its out of alignment.