Columbia subject headings:
Lenses--Design and construction--Congresses.
Optical instruments--Design and construction--Computer programs--Congresses.
Optical instruments--Design and construction--Congresses.
Harvard subject headings:
Princeton subject headings:
Lenses--Design and construction--Congresses.
Lenses--Design and construction--Data processing--Congresses.
Optical instruments--Design and construction--Congresses.
Optical intruments--Design and construction--Data processing--Congresses.