Another area in which LP may be helpful is the understanding of the risk factors and possible treatment for PACG. Progressive shallowing of the anterior chamber (AC) in predisposed eyes is mostly attributable to age-related increase in lens thickness and more anterior positioning of the lens. The restoration of a deeper angle configuration by removing a thickened and anteriorly positioned lens may be advantageous in eyes with PACG and may lead to a significant IOP reduction. Furthermore, differences in ocular anatomy may contribute to ethnic differences in glaucoma risk, particularly for PACG. Previous studies showed that a more anterior lens is related to higher risk for angle closure.[18–20]