# K992010: W-55 (Methafilcon a) Clear and Visibility Tinted Lens Blank and Horizon 55 Soft (Clear) and Horizon 55 Westint (Tinted)

- Pathway: 510(k) (Special)
- Applicant: Westcon Contact Lens Co., Inc.
- Decided: Jun 29, 1999 after 14 days
- Product code: LPL (Lenses, Soft Contact, Daily Wear)
- Device class: 2
- Regulation: 21 CFR 886.5925
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
Longest line of descent: 1 generation back to K954524 (1996). 1 ancestor in all.
7 later devices descend from it; 2 cite it directly.
0 of 9 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- K954524: W-55 (Methafilon a) Contact Lens, Westcon Contact Lens Co., Inc. (1996) Summary page 2.

## Most influential descendants
- K031774: Horizon (Methafilcon a) Daily Wear Sphere and Toric Contact Lenses (2004), 5 descendants of its own
- K043540: Horizon 59 Oasis (Hioxifilcon a) Daily Wear Contact Lenses (2005), 4 descendants of its own
- K070308: Flexlens Multifocal Soft Contact Lens, (Hioxifilcon a) and (Hioxifilcon B) for Daily Wear (2007), 2 descendants of its own
- K100443: Definitive, Flexlens - Silicone Hydrogel (2010), 1 descendant of its own
- K242059: Flexlens Silicone Hydrogel Daily Wear Soft (Hydrophilic) Contact Lens (efrofilcon A) (2024), 0 descendants of its own

## Indications for use
The Horizon 55 Westint and Horizon 55 (methafilcon A) Soft (hydrophilic) Contact Lenses for daily wear are indicated for the correction of visual acuity in non aphaklc persons with non-diseased eyes with myopia or hyperopia.

Source page: https://510kreport.com/device/K992010
Methodology: https://510kreport.com/methodology