Retinal detachment occurs when the light-sensing layer inside your eye, the retina, detaches from the underlying pigmented tissue layer that provides it oxygen and nutrients. Retinal detachment can happen spontaneously with no obvious or underlying cause.
Thus, vertical analysis is nothing but the comparative analysis of an economic statement, in which all baseline items on an economic statement are shown as a fraction of a further item.
A meta-analysis is basically a study about studies in order to get an integrated result. In other words, a researcher reviews previously published studies on a topic, and analyzes the various results to find general trends across the studies.