Devices descending from K171404
14 later devices reach BOSTON XO (hexafocon A), BOSTON XO2 (hexafocon B) through their predicates, nearest generation first.
| Generation | Number | Device | Applicant | Decided | Own descendants | Recalls |
|---|---|---|---|---|---|---|
| +1 | K253822 | GPA (hexafocon A) Rigid Gas Permeable Contact Lenses | Zhuhai Fitlens Medical Technology Co., Ltd. | 2026 | 0 | — |
| +1 | K221768 | Oxfore®100 (hexafocon A) Rigid Gas Permeable Contact Lenses | Paragon Vision Sciences, Inc. | 2023 | 0 | — |
| +1 | K183167 | Boston ES (enflufocon A) Rigid Gas Permeable Contact Lens; Boston EO (enflufocon B)… | Bausch & Lomb, Incorporated | 2019 | 5 | — |
| +1 | K183175 | BostonSight Scleral | Bostonsight | 2019 | 1 | 1 |
| +1 | K180616 | OPTIMUM GP (roflufocon D, roflurocon E) Daily Wear Contact Lens, HEXA100 (hexafocon A)… | Contamac, Ltd. | 2018 | 9 | — |
| +2 | K241571 | BostonSight® Specialty Lenses | Boston Foundation For Sight, Inc. D/B/A Bostonsight | 2024 | 0 | — |
| +2 | K240618 | Acuity 200™ (fluoroxyfocon A) Rigid Gas Permeable Contact Lens; Acuity 100™ (hexafocon… | Acuity Polymers, Inc. | 2024 | 3 | — |
| +2 | K230965 | Acuity 100™ (hexafocon A) with Tangible™ Hydra-PEG®, TYRO™-97 (hofocon A) with Tangible™… | Acuity Polymers, Inc. | 2023 | 4 | — |
| +2 | K212631 | Optimum Infinite (tisilfocon A) Daily Wear Contact Lenses | Contamac, Ltd. | 2022 | 7 | — |
| +3 | K242393 | Acuity 181™ (tisilfocon A) and Acuity 181™ (tisilfocon A) with Tangible™ Hydra-PEG®… | Acuity Polymers, Inc. | 2024 | 0 | — |
| +3 | K241398 | SDJMASTERVISION (fluoroxyfocon A) Rigid Gas Permeable Contact Lenses | Tianjin Mastervision Technology Co., Ltd. | 2024 | 0 | — |
| +3 | K230910 | NewVision SC (tisilfocon A) Scleral Lens; NewVision SC Daily Wear Ortho-K (tisilfocon A)… | Acculens, Inc. | 2023 | 0 | — |
| +3 | K223394 | Visionary Optics Scleral Contact Lens (roflufocon D, roflufocon E, hexafocon A… | Visionary Optics, LLC | 2022 | 5 | — |
| +4 | K233325 | Visionary Optics Scleral Contact Lens (roflufocon D, roflufocon E, hexafocon A… | Visionary Optics, LLC | 2024 | 4 | — |