Glassesdirect.co.uk will use two of Platform-A's advertising services in a campaign through one of its main networks, advertising.com
Glasses Direct allows customers to make online purchases with the help, advice and approval of registered opticians.
Platform-A will manage the display advertising campaign by building brand awareness through targeted activity on advertising.com's network of third-party publisher sites.
Consumers who have visited Glasses Direct, but have not made a purchase, will be retargeted across the network.
Brendan Condon, managing director of Platform-A International, said: "By working with Platform-A's leading advertising and affiliate networks, Glasses Direct will be able to expand its consumer reach, build brand awareness and drive sales."
Phil Gates, marketing director at Glasses Direct, said: "The combined weight of Advertising.com and buy.at will give us the reach, inventory and technology to engage high-volume audiences."