La presbytie est un trouble de l’accommodation induit par une diminution de l’élasticité du cristallin
qui apparaît physiologiquement après la quarantaine.
This results in a slow decrease in the ability of the eye to focus on objects nearby.
Presbyopia is a natural evolution of the aging process and affects everyone :
- Monovision and combined vision : Using PRK or Lasik surgery for myopia and hyperopia, and inducing a small degree of myopia on the dominated eye allows a comfortable close-up vision, while the dominating eye is corrected for far vision.
- Presby-Lasik : Lasik surgery that combines hyperopia correction for far vision and presbyopia for close vision on a second corneal focal. Visual outcome is usually 0.7 to 0.8 for far vision and 0.9 to 1.0 for close vision.
- PresbyMax : this is a treatment incorporated into the Schwind Amaris laser that allows computer-assisted treatment of presbyopia associated with myopia, hyperopia or astigmatism by creating a corneal multifocality that provides distance and near vision without correction. This technique is reversible in case of disturbing night-time visual disturbances.
This treatment module is ideal for the safe and effective treatment of patients with myopia, hyperopia, or astigmatism with presbyopia. PresbyMAX is based on a bi-aspheric and multifocal corneal ablation profile.
- Corneal Inlays Placement of an intra-corneal device in the non-dominant eye, allowing close vision without glasses by pinhole effect or focusing through a small hole (KAMRA technique) or by refractive effect. This technique is reversible by removing the device in case of intolerance or poor visual quality.
- PRELEX (Presbyopic Lens exchange): Extraction by phacoemulsification of the opacified lens and insertion of a multi-focal or accommodative artificial lens, allowing far vision and near vision without glasses in 80% to 90% of cases. In 10% to 20% of cases, glasses are needed for reading small characters in near vision. Limits and complications of PRELEX are similar to cataract surgery.
Multi-focal or accommodative artificial lens :