Name of the Procedure:

Variable Asphericity Lens, Bifocal, Full Field, Glass or Plastic, Per Lens (V2430)

Summary

The variable asphericity lens procedure involves fitting a specialized bifocal lens designed to correct vision by offering two different strength prescriptions in one lens. This type of lens is available in both glass and plastic materials and provides enhanced visual acuity by reducing distortions typically associated with standard lenses.

Purpose

The primary purpose of using a variable asphericity bifocal lens is to address vision issues such as presbyopia and other conditions requiring multifocal correction. The goal is to achieve clearer vision at multiple distances, enhance overall visual comfort, and reduce eyestrain.

Indications

• Presbyopia
• Difficulty in focusing on objects both near and far
• Requirement for both near and distance vision correction
• Patients seeking reduced visual distortion and improved acuity

Preparation

• Comprehensive eye examination by an optometrist or ophthalmologist
• Measurement of pupillary distance and other relevant ocular parameters
• No specific fasting or medication adjustments generally required

Procedure Description

1. Eye Examination: A detailed eye examination is conducted to determine the exact prescription for each part of the bifocal lens.
2. Lens Selection: Based on the examination, the appropriate lens type (glass or plastic) is selected.
3. Customization: The lens is customized according to the patient's prescription, with specific asphericity adjustments.
4. Fitting: The lens is fitted into a suitable frame and adjusted to ensure comfort and optimal vision.
5. Final Check: The fitted glasses are tested to ensure they meet the required vision correction standards.

Tools and equipment include refractive measurement devices, fitting accessories, and lens crafting tools. No anesthesia or sedation is required for fitting the lenses.

Duration

The fitting process typically takes about 30 to 60 minutes depending on the complexity of the prescription.

Setting

The procedure is usually performed in an optometrist’s office or an optical dispensary.

Personnel

• Optometrist or ophthalmologist
• Optical technician

Risks and Complications

While generally safe, some risks may include:

• Initial visual discomfort or dizziness
• Adaptation period wherein the brain adjusts to the new lenses
• Rarely, incorrect prescription leading to further adjustments

Complications are generally managed by revisiting the optometrist for adjustments.

Benefits

• Enhanced clarity at multiple distances
• Reduced eye strain and visual distortion
• Improved overall visual performance

Benefits are usually realized within days to a couple of weeks as the eyes and brain adapt.

Recovery

• No specific recovery time; immediate resumption of daily activities is possible
• Follow-up appointments if issues arise or adjustments are needed
• Patients may need a short adaptation period to get used to the new lenses

Alternatives

• Single vision lenses: Simpler but less versatile for multiple focusing distances.
• Progressive lenses: Offer gradual transition between focal points but can cause peripheral distortion.
• Bifocal contact lenses: Provide similar benefits without frames but may require adjustment to get used to wearing contacts.

Patient Experience

• Patients may experience an initial adjustment phase with mild discomfort or dizziness.
• Any discomfort is usually temporary and manageable with regular wear.
• Care instructions include good lens cleaning practices to maintain clear vision and comfort.