Phakic intraocular lenses (PIOLs) are implantable lenses that are surgically placed in the eye without removing the natural lens, allowing light to focus on the retina and improve uncorrected visual acuity. PIOLs are used to correct high myopia or myopic astigmatism beyond the range of laser vision correction. They can be placed in the anterior chamber angle-fixed or iris-fixed, or in the posterior chamber. Candidates for PIOLs must be over 21, have a stable refraction for at least one year, a clear natural lens, myopia not suitable for laser correction, and unsatisfactory vision with other options. The document then discusses different types of anterior chamber and posterior chamber

1. Phakic IOL
By
Dr. Alshymaa moustafa
Ophthalmology specialist

2. INTRODUCTION
 Phakic intraocular lenses (PIOLs) are clear implantable lenses that are surgically placed
either in anterior chamber (AC) or posterior chamber (PC) without removing the natural
lens, enabling light to focus on the retina for improved uncorrected visual acuity.
 PIOLs demonstrate high optical quality and potential gain in visual acuity in myopic
patients due to retinal magnification.
 Correction is not limited by corneal thickness or topography; faster visual recovery and
stable refraction are expected.
 As a reversible refractive procedure that preserves accommodative function, PIOL
implantation is attractive to both patients and refractive surgeons.

3. INDICATIONS
 The principal indication for PIOLs is correction of myopia or myopic astigmatism
beyond the range of laser vision correction (LVC).

4. LOCATION
 Three locations for PIOLs have been described.
 These include:
1. anterior chamber angle-fixated PIOL.
2. anterior chamber iris-fixated PIOL.
3. posterior chamber PIOL.

5. PREREQUISITES FOR PHAKIC
INTRAOCULAR LENSES
 General criteria should be followed for good predictability and safety.
 These include:
1. Age >21 years;
2. stable refraction (less than 0.5D change for 1 year).
3. clear crystalline lens.
4. ametropia not appropriate for excimer laser surgery.
5. unsatisfactory vision with contact lenses or spectacles.

7. ANTERIOR CHAMBER IRIS-FIXATED
PHAKIC INTRAOCULAR LENSES
Artisan/Verisyse PIOl
Artiflex/Veriflex PIOl

9. ANTERIOR CHAMBER ANGLE-FIXATED
PHAKIC INTRAOCULAR LENSES

12. POSTERIOR CHAMBER PHAKIC
INTRAOCULAR LENSES

14. Thanks