| TKO OPTO-MEDICAL LIMITED | Private company limited by shares | Dissolved |
| ISIGHT OPTOMETRIC RESEARCH CENTER LIMITED | | Live |
| HD OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| EK Optometric Centre Limited | Private company limited by shares | Live |
| CHARMING OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| SMART CHOICE OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| OPTIMIZ OPTOMETRIC CLINIC LIMITED | Private company limited by shares | Live |
| BEST OPTOMETRIC CONSULTANTS LIMITED | Private company limited by shares | Live |
| HONG KONG OPTOMETRIC CONSULTANTS LIMITED | Private company limited by shares | Dissolved |
| ASIA PACIFIC OPTOMETRIC RESEARCH CONSULTANTS LIMITED | Private company limited by shares | Live |
| OPTOMETRIC DEVELOPMENT LIMITED | Private company limited by shares | Live |
| OPTOMETRIC DEVELOPMENT (ASIA) LIMITED | Private company limited by shares | Dissolved |
| ELITE OPTOMETRIC LIMITED | Private company limited by shares | Live |
| F.C. AND ASSOCIATES OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Dissolved |
| OPTOMETRIC PRACTITIONERS (H.K.) LIMITED | Private company limited by shares | Live |
| HONG KONG OPTOMETRIC ASSOCIATION, LIMITED -THE- | Company limited by guarantee | Live |
| LANDY CHINA OPTOMETRIC CONSULTATION AND MANAGEMENT COMPANY LIMITED | Private company limited by shares | Live |
| Lumic Optometric Limited | Private company limited by shares | Live |
| OCULAR OPTOMETRIC PRACTICE LIMITED -THE- | Private company limited by shares | Dissolved |
| POLY OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| SAMUEL T. W. HUI OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| 20/20 OPTOMETRIC SERVICES LIMITED | Private company limited by shares | Live |
| HONG KONG OPTOMETRIC SERVICES LIMITED | Private company limited by shares | Live |
| USA US-PUPIL OPTOMETRIC TECHNOLOGY LIMITED | Private company limited by shares | Live |
| PRO VISION OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| VISION OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| SMART VISION OPTOMETRIC CENTRE LIMITED | Private company limited by shares | Live |
| ASIAN OPTOMETRIST ASSOCIATION LIMITED | Company limited by guarantee | Dissolved |
| OPTOMETRIST CHAN & PARTNERS LIMITED | Private company limited by shares | Live |
| EYECHOICE OPTOMETRIST CENTER LIMITED | Private company limited by shares | Live |
| The Hong Kong Optometrist Consultancy Limited | | Live |
| LONDON OPTOMETRIST COMPANY LIMITED | Private company limited by shares | Dissolved |
| LUCIA SAN OPTOMETRIST LIMITED | Private company limited by shares | Live |
| O-PS OPTOMETRIST LIMITED | Private company limited by shares | Live |
| ULRICA LAI OPTOMETRIST LIMITED | Private company limited by shares | Live |
| STANDARD OPTOMETRISTS CENTRE LIMITED | Private company limited by shares | Dissolved |
| HK DAGUANGMING OPTOMETRISTS GLASSES LIMITED | Private company limited by shares | Dissolved |
| GOOD VISION OPTOMETRISTS CENTRE LIMITED | Private company limited by shares | Dissolved |
| INFINITY OPTOMETRISTS LIMITED | Private company limited by shares | Live |
| LUCIA SAN OPTOMETRISTS LIMITED | Private company limited by shares | Dissolved |
| MERRINGTON OPTOMETRISTS LIMITED | Private company limited by shares | Live Commenced dormancy on 11-Dec-1998 |
| YI OPTOMETRY LIMITED | Private company limited by shares | Live |
| CHINA ADOLESCENT OPTOMETRY AND VISION REHABILITATION RESEARCH CENTER LIMITED | Private company limited by shares | Live |
| iSight Optometry Center Limited | Private company limited by shares | Live |
| ALL IN ONE OPTOMETRY CENTRE LIMITED | Private company limited by shares | Live |
| DR. EYE OPTOMETRY CENTRE LIMITED | Private company limited by shares | Live |
| HEALTH GUARD OPTOMETRY & VISION CARE CENTRE LIMITED | Private company limited by shares | Dissolved |
| China Eye Optometry Association Limited | Private company limited by shares | Live |
| France Doctor Ming Optometry Technology Co., Limited | Private company limited by shares | Live |
| German Optometry and Ophthalmology Clinic Research Institute Co., Limited | Private company limited by shares | Live |
| YODO OPTOMETRY (HONG KONG) TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| UMP EYECARE AND OPTOMETRY CENTRE LIMITED | Private company limited by shares | Live |
| EYESIGHT HONG KONG OPTOMETRY CENTER LIMITED | Private company limited by shares | Live |
| FOCUS OPTOMETRY LIMITED | Private company limited by shares | Live |
| Glorious Optometry Limited | Private company limited by shares | Live |
| EYE & HEALTH OPTOMETRY CO. LIMITED | Private company limited by shares | Live |
| Hong Kong Medical Optometry Center Limited | | Live |
| HONG KONG LINMU OPTOMETRY RESEARCH INSTITUTE COMPANY LIMITED | Private company limited by shares | Live |
| JJM OPTOMETRY TECHNOLOGY HONG KONG LIMITED | Private company limited by shares | Dissolved |
| Optomodo Limited | Private company limited by shares | Live Commenced dormancy on 16-Nov-2015 |
| OPTON (CHINA) LIMITED | Private company limited by shares | Live |
| OPTON HONG KONG LIMITED | Private company limited by shares | Live |
| OPTON (FUJIAN) OPTICS CO., LIMITED | Private company limited by shares | Live |
| OptOnc Health Management Co., Limited | Private company limited by shares | Live |
| OPTOPLEX LIMITED | Private company limited by shares | Live |
| SINTECH OPTOPOWER LIMITED | Private company limited by shares | Live |
| OPTO-PRO ENTERPRISES LIMITED | Private company limited by shares | Dissolved |
| OPTOPROBE LIMITED | Private company limited by shares | Live |
| OPTOR INVESTMENT LIMITED | Private company limited by shares | Live |
| OPTOROUTE HK LIMITED | Private company limited by shares | Live |
| OPTORUNNING OPTOELECTRONIC TECHNOLOGY CO., LIMITED | Private company limited by shares | Live |
| OPTOSCREEN CORPORATION LIMITED | Private company limited by shares | Live |
| Orient Opto-Semiconductors Corporation (Hong Kong) Limited | Private company limited by shares | Dissolved |
| OPTO-SENSOR LIMITED | Private company limited by shares | Live |
| Optostars Group Limited | Private company limited by shares | Live |
| OPTOSTOR PAPYRUS LIMITED | Private company limited by shares | Dissolved |
| OPTOSUN LED TECHNOLOGY COMPANY LIMITED | Private company limited by shares | Live |
| OPTOSUN TECHNOLOGY LIMITED | Private company limited by shares | Live |
| OPTOSUPPLY LIMITED | Private company limited by shares | Live |
| OPTOSUPPLY ELECTRICAL LIMITED | Private company limited by shares | Live |
| OPTOSUPPLY ELECTRONICS LIMITED | Private company limited by shares | Live |
| OPTOSUPPLY ENERGY LIMITED | Private company limited by shares | Dissolved |
| OPTOSUPPLY INTERNATIONAL LIMITED | Private company limited by shares | Dissolved |
| OPTOSUPPLY TECHNOLOGIES LIMITED | Private company limited by shares | Live |
| J&K OPTOTEC CO., LIMITED | Private company limited by shares | Live |
| OPTOTEC HONG KONG LIMITED | Private company limited by shares | Dissolved |
| OPTOTEC MATERIALS CO., LIMITED | Private company limited by shares | Live |
| OPTOTECH ASIA LIMITED | Private company limited by shares | Live |
| CHINA OPTOTECH COMPANY LIMITED | Private company limited by shares | Live |
| DANA OPTOTECH LIMITED | Private company limited by shares | Live |
| EVER SHINING OPTOTECH COMPANY LIMITED | Private company limited by shares | Live |
| JTU OptoTech (Hong Kong) Co. Limited | Private company limited by shares | Dissolved |
| JIMEI OPTOTECH LIMITED | Private company limited by shares | Live |
| HOEOO OPTOTECH (HONG KONG) CO., LIMITED | Private company limited by shares | Live |
| WISE OPTOTECH LIMITED | Private company limited by shares | Live |
| RUNWELL OPTO-Telecom Limited | Private company limited by shares | Live |
| HONGKONG OPTOTHERMAL EXPLOITATION LIMITED | Private company limited by shares | Dissolved |
| NITTO OPTOTRONICS LIMITED | Private company limited by shares | Live |
| Optovance Limited | Private company limited by shares | Live |
| OPTOVISIONS CO. LIMITED | Private company limited by shares | Live |