Grzybowski , A., and A. Maciejewski. “The Social Costs of Deferred Cataract Surgery With Implantation of the Intraocular Lens”. OphthaTherapy. Therapies in Ophthalmology, Vol. 3, no. 1, Mar. 2016, pp. 53-58, https://journalsmededu.pl/index.php/ophthatherapy/article/view/593.