Lensfour is rated 3.9 out of 5 in the category contact lenses supplier. Read and write reviews about Lensfour. Lensfour is a leading contact lens store based in Hong Kong that is dedicated to providing you a simple way to replace your contact lenses. At Lensfour, you’ll receive the exact contact lenses your eye doctor prescribed, delivered directly to your door, for a fraction of the cost. We pride ourselves in offering our customers great deals on authentic contact lenses that the competition simply cannot match.