Discussion
dysphotopsia, astigmatism, presbyopia, corneal astigmatism, Ota, IOL
IOL, NEAR VISION, ASTIGMATISM, PRESBYOPIA, CORNEA, AFTER CATARACT, MYOPIA, PRESBYOPIA
Presbyopia correction IOL is one of the most important methods to correct presbyopia after cataract surgery. Presbyopia correction IOLs can be divided into multifocal IOL, EDOF IOL and accommodating IOL [Since presbyopia correction IOLs have different advantages and disadvantages, there are various choices in helping patients correct presbyopia after surgery. Because of the better contrast sensitivity in EDOF IOL, how to improve the near vision has become a problem to be discussed in many studies, including this one. Previous studies have proved that the micro monovision and mix and match can improve the near vision. The study of Ota et al. [In this study, we compered the full distance vision especially the near vision in micro monovision, non-micro monovision and mixed groups. Both bifocal IOL (ZMB00, + 4.00D) and EDOF IOL with some residual myopia in no-dominant eye can significantly improve the near vision. The methods of micro monovision and the mixed can both help patient obtain good distance, intermediate and near vision. However, micro monovision method has better intermediate vision and mixed method has better near vision. The non-micro monovision method obviously affects the binocular near vision. Recent studies show that the blended trifocal IOL and EDOF IOL help patients improve near visual acuity [EDOF IOL has better contrast sensitivity and less serious dysphotopsia than other presbyopia correction IOLs, especially multifocal IOLs [Presbyopia correction IOL can help patients achieve spectacle independence, but it cannot achieve complete spectacle independence at all distances. In the previous studies of implantation of Symfony IOL in both eyes using micro monovision method, the results showed that the glasses demand was between 10% and 16% [The optimal refractive target for EDOF intraocular lenses in both dominant and non-dominant eyes to achieve better binocular vision in all ranges after cataract surgery continues to be discussed. The study of Jackson et al. [As also shown in Jackson’s study, 17 of their patients achieved full distance visual acuity with the refractive targets of − 0.07D for the dominant eye and − 0.21D for the nondominant eye. The authors speculated that this might be related to patients’ age, astigmatism, pupil size and the high-order aberration of the cornea. Indeed, age, corneal astigmatism, pupil diameter, corneal spherical aberration and IOL centrality will all affect the patient’s depth of field, thus may play a role in the postoperative visual acuity across all distances [