Name of the Procedure:

Contact Lens, Gas Permeable, Extended Wear, per lens
Common name(s): GP Lens, Rigid Gas Permeable (RGP) Lens
Technical/medical term: V2513

Summary

Gas permeable (GP) extended wear contact lenses are specially designed lenses that allow the patient to wear them continuously, including overnight, for an extended period, usually up to 7 days. These lenses are oxygen-permeable, helping to maintain eye health by allowing more oxygen to reach the cornea.

Purpose

GP extended wear contact lenses are designed for patients who require vision correction but prefer not to wear glasses or daily-wear lenses. The extended wear feature offers convenience for those who do not want the hassle of daily lens care routines. The goals are to correct refractive errors such as nearsightedness, farsightedness, astigmatism, and sometimes presbyopia, while minimizing the risk of complications associated with long-term contact lens use.

Indications

Indications for the use of GP extended wear contact lenses include:

• Refractive errors like myopia, hyperopia, astigmatism, and presbyopia
• Patients who have difficulty managing daily disposable contact lenses
• Those seeking a convenient option with reduced maintenance
• Medically necessary for conditions like keratoconus, where other lenses might not provide optimal vision correction

Preparation

• Follow the practitioner's guidelines on lens wear and hygiene.
• A thorough eye examination is required to determine suitability.
• Discuss any eye conditions or allergies with the eye care specialist.
• Understand how to properly insert, remove, and care for the lenses.

Procedure Description

1. Eye Exam: The optometrist/ophthalmologist performs a detailed eye exam to determine prescription and suitability for GP lenses.
2. Lens Fitting: Personalized fitting of the GP lens is conducted to ensure optimal comfort and vision.
3. Instruction: Patients receive detailed instructions on how to insert, remove, and care for their lenses.
4. Trial Period: Initial trial of the lenses to adjust to wear, usually monitored with follow-up appointments.

Tools or equipment used:

• Keratometer for measuring the curvature of the cornea
• Slit lamp for detailed eye examination
• Fitting sets of GP lenses for trial

Duration

The fitting process requires at least one hour, but the actual wear time is continuous for up to 7 days, after which lenses must be removed for cleaning and disinfection.

Setting

Typically performed at an optometrist or ophthalmologist’s office with follow-up visits scheduled as needed.

Personnel

• Optometrist or ophthalmologist
• Optometry assistants or technicians for initial fitting and follow-up evaluations

Risks and Complications

• Risk of eye infections if not cared for properly
• Potential for dry eyes or discomfort
• Possible development of corneal complications such as abrasions or ulcers
• Management involves immediate removal of lenses and seeking medical care if any discomfort or issues arise

Benefits

• Continuous wear for up to 7 days offers unmatched convenience.
• Stable, clear vision correction.
• Reduced risk of lens loss or damage compared to daily lenses.
• Benefits may be noticed immediately after the adaptation period.

Recovery

• Adaptation period of one to two weeks where the patient might experience mild discomfort.
• Regular cleaning and disinfecting routines to reduce risks of infections.
• Follow-up appointments to ensure fit and eye health are optimal.

Alternatives

• Daily wear GP lenses
• Soft contact lenses (daily, bi-weekly, or monthly disposables)
• Orthokeratology (overnight lenses that reshape the cornea)
• Corrective eyewear such as glasses
• Refractive surgery (LASIK, PRK)

Patient Experience

Patients might experience initial discomfort as they adapt to the lenses. Proper insertion, removal, and care techniques will be taught to minimize discomfort. Regular follow-ups help in monitoring eye health and lens fit. Proper hygiene and care are crucial to avoid infections and other complications, ensuring a positive outcome.

Pain management and comfort measures include the use of lubricating eye drops and adhering to the recommended wearing schedule.