Krzysztofiak , Katarzyna, and Kamila Ciężar. “The Structure and Properties of Water Gradient Silicone Hydrogel Contact Lenses”. OphthaTherapy. Therapies in Ophthalmology 3, no. 3 (September 30, 2016): 225-228. Accessed May 12, 2025. https://www.journalsmededu.pl/index.php/ophthatherapy/article/view/625.