Anyone know of a place I can go to help me understand lens reflections?
Lens "reflections"? or do you mean "refractions"? If you do mean "reflections" then you would look at the same optics that apply to mirrors.
But refraction is the phenomena that is usually studied with lenses. Use the search function of your browser with the keywords "lens optics" and you will find many sites.
Depends on the level of understanding you want really. If you want to just use lenses and understand the principles, any good Physics book will tell you all you need to know. If you want a deeper understanding, try Richard Feynman's book QED.
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