Here are the Alexa rankings as of today:

==============>ALEXA
Optiboard USA 4 224,984, in USA 63,486 http://optiboard.com
Ochki net (Russia) 4 392,814 in Russia 32,234 http://www.ochki.net/forum/
OD wire.org 4 448,793, in USA 68,195 http://www.odwire.org/forum/
Optician Online 5 556,315 , in UK 50,004 http://www.opticianonline.net/discus...rums/list.aspx
Lens 101, Contact lens forum 2 546,464, in USA 235,382 http://www.lens101.com/
Optiker.de (Germany) 756,516 in Germany 66,079 http://optiker.de/
Sunglassforums.com (commercial) 1,138,349 http://sunglassforums.com/
LUXURY EYEWEAR FORUM 1,347,573, in the USA 648,051 luxuryeyewearforum.com
opticos-optometristas.com
Spain		 2,346,559 http://www.opticos-optometristas.com/foro/
optom.com,
UK forum for optometrists		 3 No Data http://theoptom.com/index.php
SightNation - 8,173,560 http://www.sightnation.com/
Optom Forum Australia 1 9,749,265 http://www.optomforum.com.au/
Laramy-K Forum Dead http://www.laramyk.com/
Opti Forum 0 Dead http://optiforum.invisionzone.com/
Optiglglazer UK 0 Dead http://www.optiglazer.co.uk/
Eye Overheard now defunct (Feb 2011) 0 Dead http://eyeoverheard.wordpress.com/
Opticians Lounge, Canada 0 Dead http://opticianslounge.net/
updated ▲ November 29, 2015▲ ▲ ▲ updated ▲ November 29, 2015▲

as per my updated listing at : ============>
http://optochemicals.com/web_listing.htm