This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Ophthalmology
Intraocular lenses are made up of 
Select and explain. 
A. PMMA, B. HEMA, C. Glass, D. Plastic
A: PMMA
Answer: A: PMMA 
Explanation: A i.e. PMMA The Optic pa of non foldable lenses are made up of PMMA (Poly methyl methacrylate) Q where as foldable lenses are made up of silicon, hydrophobic or hydrophilic acrylic.Q The Haptic pa of both is made of polypropylene, PMMA, acrylic. Lens Made up of Contact lens: 1. Hard PMMA (Polymethyl methaacrylate) Q 2. Soft HEMA (Hydroxy methyl methaacrylate) Q 3. Semi soft PMMA + Silicon + CAB Intraocular lens: 1. Optic pa Non foldable PMMA Q Foldable Silicone, Hydrophilic & Hydrophobic acrylic 2. Haptic pa Polypropylene, PMMA, Acrylic