AUTHOR=Li Yuzhi , Jin Ling , Wu Mingfeng , Huang YuKan 

TITLE=Evaluation value of subjective visual quality examination on surgical indications of the early cataracts based on objective scatter index values

JOURNAL=Frontiers in Medicine

VOLUME=Volume 9 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/medicine/articles/10.3389/fmed.2022.1075693

DOI=10.3389/fmed.2022.1075693

ISSN=2296-858X

ABSTRACT=Aims: To evaluate the subjective visual functions of early cataracts patients and assess their surgical indications.
Methods: Eyes were separated into a control group (Group A without cataract) and two early cataracts groups (Group B with 2.0≤OSI<3.0 and Group C with 3.0≤OSI<4.0). The objective scatter index (OSI), modulation transfer function cut-off frequency (MTF cut-off), and Strehl ratio (SR) values were applied to measure objective visual functions. The contrast sensitivity (CS) and scores of the questionnaires s (QOL and VF-14) characterized subjective visual functions. Above visual functions were compared among three groups. Postoperative visual functions in Group B and C were analyzed to assess the outcome of surgery. 
Results: 92 subjects (126 eyes) were included in the study. All objective visual functions in Group B were significantly better than Group C (all P<0.01), but worse than Group A (all P<0.01). Except for 1.5c/d CS, subjective visual functions in Group A were significantly better than Group B and C (all P<0.05), but there was no significant differences between Group B and C. As for eyes that underwent surgery in Group B and C, all visual functions significantly improved after surgery (P<0.05), except for 1.5c/d CS in Group C. There were no significant differences among the three groups after surgery. 
Conclusion: The subjective visual functions can be impaired in early cataracts patients with OSI<3.0, whose objective visual functions were statistically better than patients with OSI≥3.0. These patients can benefit equally from surgery as patients with OSI≥3.0. Subjective visual functions can be used as surgical indications for these patients.