@article {133533,
	title = {Piggyback Collagen Copolymer (Collamer) Lens in management of pseudophakic ametropia},
	journal = {Journal of refractive surgery},
	volume = {33},
	year = {2017},
	pages = {532-537},
	author = {Sherif A Eissa and Mohamed M Khafagi and Sidky, Mohamed Karim}
}
