Original Research Article
Year: 2020 | Month: January | Volume: 7 | Issue: 1 | Pages: 339-344
Constant Parameter Linear Phaco in Different Grades of Cataract: A Correlative Study of Visual Acuity with Phaco Time
Arun Samal1, R J Dash2, Z U Khan3
1MS Ophthal, DHA, VitreoRetina Trained, Associate Professor Ophthalmology, Hi-Tech Medical College & Hospital, Bhubaneswar, Odisha State, India and
Consultant Ophthalmologist, Kalinga Eye Hospital, Dhenkanal, Odisha
2DM Endocrinology, FRCP(London), Professor, Department of Endocrinology, HI-Tech Medical College & Hospital, Bhubaneswar, Odisha State, India
Formerly Head & Director Endocrinology, PGIMER, Chandigarh, India
3MS Ophthal, Professor, Department of Ophthalmology, HI-Tech Medical College & Hospital, Bhubaneswar, Odisha State, India
Corresponding Author: Arun Samal
ABSTRACT
Purpose: To correlate first day postoperative LogMAR visual acuity with effective phaco time in phacoemulsification surgery with constant phaco parameter setting of linear mode in different grades of cataract.
Methods: One hundred forty-one consecutive senile cataract patients were enrolled in the study group. Phacoemulsification surgery in Linear mode with constant phaco parameters performed for grades I to V on exclusion of ocular comorbidities. Data recorded were age, sex, cataract grades as per The Lens Opacities Classification System III(LOCS), Effective Phaco Time (EPT), Total Phacoemulsification time (TPT), preoperative and first day postoperative uncorrected distant visual acuity in LogMAR standard.
Results: The mean preoperative visual acuity was >1 LogMAR in 51.77% cases and postoperative <0.5 LogMAR unit in 80% in all the grades of cataract. The Continuous mode Mean EPT both for trenching and sculpting were 38, 50.25, 63.48, 72.62 and 75.235 seconds in Grade I, II, III, IV, and V respectively. The TPT was 81.20, 98.45, 127.23, 149.49 and 163.27 seconds for grade I to V respectively. Improvement of Vision was statistically significant (P < 0.001) among all the grades of cataracts.
Conclusion: Constant phaco parameter setting in linear mode both for trenching and sculpting for all the grades of cataract showed improvement of visual acuity. Higher the EPT less was the postoperative visual outcome. Higher the grades of cataract more was the EPT and TPT. EPT was more than other phaco modes in all the grades.
Keywords: Cataract grades, Phacoemulsification, Postoperative, Visual acuity
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