BACKGROUND Cataract extraction is the largest surgical workload in the world. Goal of the modern cataract surgery is to reduce pre-operative astigmatism after operation to improve visual acuity and quality. Regarding the choice of incision location, previous studies reports that the superior incision induces greater change in corneal astigmatism (against the rule) than temporal (with the rule). With The Rule (WTR) is preferred, because it allows better uncorrected visual acuity. With The Rule

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... TR) is preferred in most cases, as it frequently allows better uncorrected visual acuity. Nowadays, phacoemulsification remains the more advanced and technically superior method of cataract surgery; it is not always either from a cost purpose and its limitations of few type of cataracts. When incision is located superiorly, both gravity and eyelid blink tend to create a drag on the incision. These forces are better neutralised with temporal incision, because it is parallel to the vector of the forces. With-the-rule astigmatism induced by a temporal incision is advantageous, because most elderly patients have preoperative against-the-rule astigmatism. When incision is located superiorly, both gravity and eyelid blink tend to create a drag on the incision. These forces are better neutralised with temporal incision, because it is parallel to the vector of the forces. With-the-rule astigmatism induced by a temporal incision is advantageous, because most elderly patients have preoperative against-the-rule astigmatism.