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This article provides a step-by-step guide to correcting presbyopia with a monocular bi-aspheric ablation profile.
The study aims to evaluate visual acuity and objective visual quality before and after the monocular bi-aspheric ablation profile for correction of presbyopia surgery. This prospective self-control study included 20 cases and 38 eyes of patients who underwent monocular bi-aspheric ablation profile correction of myopia with presbyopia at the Eye Hospital of Shandong University of Traditional Chinese Medicine from January 2023 to January 2024. These patients were selected for observation, and each patient's preoperative and postoperative uncorrected distance visual acuity (UDVA), uncorrected near visual acuity (UNVA), corrected distance visual acuity (CDVA), spherical aberration (SA) (within 6 mm), horizontal and vertical coma (within 6 mm), and corneal aspheric index (Q-value) (within 6 mm) were evaluated. Statistical data analysis was performed at different time points before and after the operation. There were statistically significant differences in UDVA between dominant and non-dominant eyes before and after surgery (Z = -3.784, p < 0.001; Z = -3.817, p < 0.001). Post-operatively, 90% of the non-dominant eyes achieved UNVA of J1 and above, and 95% of the bilateral eyes achieved UNVA of J1 and above. Significant differences were found in the SA of the dominant eyes, which showed a positive increase (Z= -3.784, p < 0.001); however, compared with the dominant eye, the SA of the non-dominant eye was negatively increased, but the difference was not statistically significant (p = 0.08). There was a significant difference in the vertical coma of the dominant eye before and after the operation, but there was no significant difference in non-dominant eyes. There was no significant difference in the change of binocular horizontal coma before and after the operation. There were significant changes in the Q value of both eyes before and after the operation (Z = -3.923, p < 0.001; Z = -3.51, p < 0.001). After the monocular bi-aspheric ablation profile, the cornea of the non-dominant eye showed a prolate shape, negative SA increased, and the UDVA and UNVA improved after the operation.
Presbyopia is an age-related reduction in amplitude of accommodation leading to loss of near vision due to the loss of function of the lens and ciliary muscle1. The global population of presbyopes is projected to exceed 2 billion by 2030, with uncorrected and undercorrected presbyopia affecting socio-economic development2. Correction of presbyopia includes lens correction, surgical approaches, and medication. Corneal surgery is one of the main forms of corneal surgery to correct presbyopia because of its less invasive nature, fewer complications, and faster recovery3.
R....
The following protocol was reviewed and approved by the Ethics Committee of the Affiliated Eye Hospital of Shandong University of Traditional Chinese Medicine (Grant No. HEC-KS-2020002KY), and was strictly adhered to the Declaration of Helsinki. All patients signed an informed consent form.
1. Patient selection
NOTE: 20 patients (38 eyes) with presbyopia treated by excimer laser monocular multifocal bi-aspheric ablation were admitted to the Department.......
A total of 20 patients who underwent the monocular bi-aspheric ablation profile for correction of presbyopia were analyzed in this study. The preoperative age of the patients was 47 (± 3.36) years, and the preoperative spherical equivalent (SE) of the dominant and non-dominant eyes were -4.47 D (± 2.16) D and -4.34 D (±2.09 D), respectively. All surgeries were completed with no postoperative complications.
Visual acuity results
There was no significant dif.......
Currently, there are limited effective methods for restoring ocular accommodation, making presbyopia a prominent area of research in refractive surgery. The bi-aspheric ablation profile, a widely recognized clinical modality for presbyopia correction, has shown favorable safety and efficacy with satisfactory postoperative outcomes15,16,17. However, there is a paucity of studies focusing on the monocular mode. In this study, we p.......
Shandong Medical and Health Science and Technology Development Plan Project (202207020806)
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0.9% Sodium Chloride Physiological Solution | Shandong Qidu Pharmaceutical Co., Ltd. | H37020764 | |
AMARIS 1050RS Excimer Laser System | SCHWIND eye-tech-solutions,DE | https://www.eye-tech-solutions.com/amaris1050-excimer-laser | |
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Dexamethasone Eye Drops | Alcon-Couvreur | H20150119 | |
Dextran 70 | Chengdu Qingshan Likang Pharmaceutical Co. | 6941684920076 | |
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Hypromellose 2910 | Chengdu Qingshan Likang Pharmaceutical Co. | 6941684920076 | |
Levofloxacin Hydrochloride Eye Drops | Shandong Bausch & Lomb Freda Pharmaceutical Co., Ltd | 6924090700180 | |
Proparacaine hydrochloride Eye Drops | Alcon-Couvreur | H20103352 | |
SCHWIND Cutom Ablation Manager for Amaris | Consorzio Servizi Ortopedici,Turin,IT | N/A | |
Sirius 3D anterior segment and corneal aberration analyzer | Consorzio Servizi Ortopedici,Turin,IT | YM0020207Â | |
Skin disinfectant | Jinan Xinyongtai Shiye Co., Ltd | http://www.sdxyt.cn/zh/products_detail.asp?id=23 | |
Sterile Irrigator for Single Use | Shandong Weigao Group Medical Polymer CO.,Ltd | https://weigaogroup.com/photo/show-114.aspx | |
Sterile medical sponge for Single Use | Beijing Kang'an Kelin Technology Co., Ltd | SS-96A | |
Tobramycin Eye Drops | Alcon-Couvreur | H20150119 | |
Transparent Film Dressing Frame Style | Minnesota Mining and Manufacturing | 1624WCN | |
VisuMax femtosecond laser system | Carl Zeiss Meditec, Inc., Dublin, CA | 20183241728 |
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