Phakic lenses are special optical lenses placed inside the eye without replacing the natural lens. These lenses are used to correct refractive errors (myopia, hypermetropia, astigmatism). Phakic lenses are considered an alternative to traditional glasses and contact lenses and are widely used in modern ophthalmology. In this article, we will provide detailed information about the types, advantages, disadvantages, and uses of phakic lenses.
Types of Phakic Lenses
Phakic lenses are a type of intraocular lens.
- Design: These lenses are placed inside the eye and resemble the lenses used in cataract surgery. They are positioned between the iris and the natural lens (crystalline lens).
- Material: Intraocular lenses are generally made from silicone or acrylic materials. High-quality optical materials are used in their construction, which enhances visual quality.
- Use: They are applied to people over 18 who are not suitable for excimer laser procedures (for vision correction). Whether a person’s eye parameters are suitable for this procedure is evaluated by a doctor during an examination.
Advantages
- Clear and High-Quality Vision Without Glasses: Phakic lenses preserve the health of the natural lens and significantly improve visual quality. This allows patients to live comfortably without the need for glasses or contact lenses.
- Corrects High Degrees of Myopia, Hypermetropia, and Astigmatism: Phakic lenses can be adapted for various refractive errors. Doctors select the most suitable lens based on the patient’s eye structure and visual needs, especially beneficial in cases of severe myopia or hypermetropia.
- Reversibility: Unlike other refractive surgeries, phakic lenses offer a reversible procedure. The eye’s natural lens is preserved, and the lens can be removed if necessary, providing patients with a sense of security and comfort.
- Lower Risk: Compared to laser surgeries, phakic lenses carry a lower risk since the eye's natural structure remains intact, reducing postoperative complications.
- Improved Visual Quality: Patients achieve a wider field of vision and brighter images with phakic lenses. Visual quality is clearer than with glasses or contact lenses.
- Quick and Painless Surgery: The procedure takes about 10 minutes and is performed under local anesthetic drops. No injections are made into the eye, though 10-minute sedation can be provided for people with labile nervous systems (e.g., panic attacks). Generally, sedation is rarely needed, as there is no pain during the procedure.
Disadvantages
- Requires Surgical Procedure: Phakic lens insertion requires a minor surgical procedure,(The surgery is performed within a duration of 10 minutes) which can be uncomfortable for some people, especially those with surgical fears.
- High Costs: Phakic lenses are more expensive than contact lenses or glasses, which may be a disadvantage due to the high financial requirements.
- Night Vision Issues: Some users may experience glare and halo effects around lights at night, which is primarily due to the eye’s adaptation. However, this is usually minimal, temporary, and improves over time.
Who is Suitable for Phakic Lenses?
Phakic lenses are ideal for the following:
- People Unhappy with Glasses and Contact Lenses: They offer an alternative for those who find glasses or contact lenses uncomfortable.
- Individuals with Refractive Errors: Ideal for people with myopia, hypermetropia, or astigmatism. All positive and negative numbers can be completely corrected.
- Those Without Cataracts: For patients with cataracts, the eye’s natural lens must be entirely replaced to improve vision.
- People with Healthy Eye Structure: Phakic lenses are more suitable for individuals with compatible eye anatomy and parameters.
Phakic lenses offer a modern approach to eye health and are an effective choice for correcting refractive errors. They help achieve positive visual outcomes while preserving the eye’s natural structures. Considering each patient’s unique needs, phakic lenses can be an excellent choice.
