đź“‹ FDA Reference
h55 hydrophilic contact lens
Martin S. Knopf Assoc.
Summary: The h55 hydrophilic contact lens is a medical device used for vision correction and is typically prescribed by optometrists and ophthalmologists. It is designed to improve visual acuity in patients with refractive errors.
FDA Clearance Information
Pathway
510K
Number
K942214 ↗
Decision Date
July 28, 1994
Product Code
LPL
Device Class
Class 2
Evidence
419 studies
The h55 hydrophilic contact lens was cleared through the FDA 510(k) pathway on July 28, 1994. It is manufactured by Martin S. Knopf Assoc. and classified as a Class 2 medical device.
What It Is
The h55 hydrophilic contact lens is a soft contact lens made from hydrophilic materials that allow oxygen to pass through to the cornea, providing comfort and maintaining corneal health. These lenses are designed to correct refractive errors such as myopia, hyperopia, and astigmatism by altering the focal point of light entering the eye.
Clinical Applications
These lenses are commonly used in optometry and ophthalmology practices for patients requiring vision correction. They are suitable for a wide range of patients, from those with mild to moderate refractive errors to those with more complex prescriptions. They are typically used in outpatient settings and can be prescribed for daily or extended wear, depending on the patient's needs and lifestyle.
Indications for Use
The FDA-cleared indications for the h55 hydrophilic contact lens include correction of refractive errors such as nearsightedness, farsightedness, and astigmatism. These lenses are intended for individuals who require vision correction and prefer contact lenses over glasses.
Practical Considerations
The h55 lenses are available in various sizes and prescriptions to accommodate different patient needs. They should be fitted by a qualified eye care professional to ensure proper fit and comfort. Patients should follow the recommended cleaning and replacement schedule to maintain lens hygiene and eye health.
Linked Studies (20)
PubMed • 2025
Onyx Liquid Embolic Agent: Basic Knowledge for Its Use in Interventional Neuroradiology.
Journal of neuroendovascular therapy
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Performance evaluation of quantitative hemoglobin A2 and fetal hemoglobin testing using commercially lyophilized vs. in-house whole blood controls in Chinese clinical laboratories: a 12-year analysis of National External Quality Assessment Data.
Clinical chemistry and laboratory medicine
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Clinical progress note: Haemophilus influenzae type b.
Journal of hospital medicine
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Pilot study of social media promotion of home-based self-testing for syphilis.
Sexually transmitted diseases
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Clinical development and performance of the First to Know Syphilis Self-Test for over-the-counter usage: a de novo rapid test for treponemal antibody.
Journal of clinical microbiology
View Source →
PubMed • 2025
Implementation of an Opt-Out and Rapid Point-of-Care Syphilis Testing Program for Pregnant Patients Presenting to the Emergency Department.
Sexually transmitted diseases
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Evaluation of Rapid Syphilis Testing Using the Syphilis Health Check in Florida, 2015-2016.
Florida public health review
View Source →
PubMed • 2025
Multiplex droplet digital PCR for the detection and quantitation of Streptococcus pneumoniae, Mycoplasma pneumoniae, and Haemophilus influenzae.
Frontiers in cellular and infection microbiology
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Palm Multidiagnostic of Mycoplasma pneumoniae, Chlamydia pneumoniae, Haemophilus influenzae, and Streptococcus pneumoniae Using One-Tube CRISPR/Cas12a.
Transboundary and emerging diseases
View Source →
PubMed • 2025
Tp40: a new potential prognostic and diagnostic marker for syphilis.
Microbiology spectrum
View Source →
PubMed • 2025
Serotonin sets up neutrophil extracellular traps to promote neuroendocrine prostate cancer metastasis in the liver.
The Journal of clinical investigation
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Application value of Philips Ingenuity TF PET/CT scanner imaging agent FAP in evaluating renal fibrosis.
Hellenic journal of nuclear medicine
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Message from Dr. Philippe T. Georgel, Guest Editor for the Marshall University Collection, Brad D. Smith, President of Marshall University, and Dr. Anivandan Mukherjee, Provost of Marshall University.
Biochemistry and cell biology = Biochimie et biologie cellulaire
View Source →
PubMed • 2025
Improved patient comfort and procedural efficiency using chlorhexidine-coated hydrophilic urethral catheters: a randomized controlled trial.
Journal of Yeungnam medical science
RCT View Source →
PubMed • 2025
pTx-Pulseq in hybrid sequences: Accessible and advanced hybrid open-source MRI sequences on Philips scanners.
Magnetic resonance in medicine
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Comparative connectomics of Drosophila descending and ascending neurons.
Nature
RCT|prospective|retrospective|case Series|other View Source →
PubMed • 2025
Hydrophilic-coated sheaths for reducing radial artery spasm during transradial procedures: A systematic review and meta-analysis.
Interventional neuroradiology : journal of peritherapeutic neuroradiology, surgical procedures and related neurosciences
View Source →
PubMed • 2025
History of antineutrophil cytoplasmic autoantibodies : Milestones in rheumatology.
Zeitschrift fur Rheumatologie
View Source →
PubMed • 2025
A Hydrophilic Polyurethane Foam Containing Nigella sativa Oil as a Wound Dressing.
BioMed research international
RCT|prospective|retrospective|case Series|other View Source →Frequently Asked Questions
What is h55 hydrophilic contact lens used for?
The h55 hydrophilic contact lens is used for correcting refractive errors such as myopia, hyperopia, and astigmatism.
What specialties typically use this device?
Optometrists and ophthalmologists typically prescribe and fit these lenses for patients requiring vision correction.
What are the FDA-cleared indications?
The FDA-cleared indications include correction of nearsightedness, farsightedness, and astigmatism.
Disclaimer: This page compiles publicly available regulatory and published clinical evidence for educational reference.
It does not constitute medical advice, product endorsement, or a recommendation for clinical use.
Always consult manufacturer documentation and clinical judgment for patient care decisions.