|Myopia and Hypermetropia mnemonic|
Hope this mnemonic helps to have a picture of what goes on in your head =)
Another silly way I remember things:
I think hypermetropics can not accommodate (can not make their lens thick) to see near things.
So that's why they need powerful (thick) or plus lens for correction.
Plus sign (+) tilted forms a cross (x) present in the word conveX.
Some people also prefer the "My cave" (Myopia - Concave) mnemonic to remember.
Remember one and the other one, is the other one.