 The best eye was selected based on less glaucoma damages. It was defined by the results of the Humphrey Visual Field HFA, Carl Zeiss Meditec, Inc., Dublin, CA, Heidelberg Retinal Tomograph HRT II, Heidelberg Engineering GmbH, Heidelberg, Germany and Optical Coherence Tomography CIRRUS HD-OCT, Carl Zeiss Meditec, Inc., Dublin, CA. The Humphrey Visual Field defines early glaucoma as a mean defect MD of -2.00 to -6.00 db, moderate glaucoma as a MD of -6.10 to -12.0 db and advanced as a MD less than -12.0 db. The Optical Coherence Tomography enables the identification of the better linear CupDisk ratio, Rim area, RNFL thickness and ganglion cells analysis between both of the patients eyes. The lesser of the maximum IOP values recorded in each of the patients eyes also contributed to the selection of the best eye. 