Markham Optical - Safety Glasses Fashion Eyewear - Sight Optical. Sight Optical - Markham Optical is owned and operated by Thomas Chu, a Registered Optician with over ten years of experience in the fashion eyewear industry. Sight Optical - Markham Optical services clients in the Markham area, and Sight Optical specializes in high-fashion prescription and non prescription glasses, sunglasses, contact lenses, safety glasses, sports goggle, and swim goggle. Website created by Dean Chu of Pigstyle Design. ©2009 Sight Optical, Markham Optical.