The Revolutionary

Ultra Compact, Ultra-Wide Field

Smartphone Ophthalmoscope 


Retina for Everyone, Everywhere

How to use OphthoLens

From Beginner to expert in 5 minutes



Our Background

RainsOptics is a Hong Kong based Research & Development company founded in 2017. The current research interest is the development of novel medical-optical instruments adapted  for  mobile  devices. RainsOptics  aimed  to  develop  diagnostic and surgical technologies  to  meet  the  demand  of  this trend.  We aimed to sophisticated medical technologies into simple, portable, affortable solutions, with uncompromised quailty.

OphthoLens, our innovation, is a revolutionary ultra-wide field smartphone ophthalmoscope. It helps to prevent blindness and promote health by providing retina examination by everyone, everywhere.

RainsOptics was one of the winners of Start-up express held by HKTDC in 2018. Our OphthoLens Project is being widely reported by Hong Kong media. 

In this rapidly changing industry, we’ve realized the importance of continually updating our approach to stay relevant in the market, and are committed to just that. We invite you to browse through our inventory and contact us with any questions.

Join Our Team

"We are finding the elites in innovative technology. If you are interested in medical  innovation, Come and join our team to explorer the application of technology in medical aspect."


C-MER RainsOptics Limited


Rm18, Unit 601, HDIH,

Core Building 1, HKSTP, Shatin, N.T.

Tel: (+852) 35905755

Fax:(+852) 35905318

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©2018 by C-MER RainsOptics Limited. Hong Kong