The normal decreasing elasticity of the crystalline lens that leads to loss of accommodation.
https://www.15-20.fr/offre-de-soins/maladies-de-loeil/chirurgie-refractive/ 2019 France popular works presbyopia presbyopia Astigmatism myopia astigmatism hyperopia Presbyopia Myopia Hypermetropia astigmatism, nos hypermetropia myopia
--- https://www.medg.fr/presbytie 2019 France teaching material scientific and technical information Presbyopia presbyopia presbyopia
--- http://www.cehjournal.org/french/journal/05/soc_05_05_004.html 2008 United Kingdom French presbyopia journal article