Magnification of the Galilean system loupe and visual acuity of dental students
Effect of different levels of Galilean system magnification on working posture and...
| Full text | |
| Author(s): |
Pazos, Julia M.
;
dos Santos, Carla G.
;
Dovigo, Livia N.
;
Garcia, Patricia P. N. S.
Total Authors: 4
|
| Document type: | Journal article |
| Source: | JOURNAL OF DENTAL EDUCATION; v. 88, n. 4, p. 7-pg., 2024-01-16. |
| Abstract | |
Objective This study aimed to evaluate the visual acuity and working distance of dental students using Galilean loupes at different magnification levels.MethodsThe participants included 50 undergraduate dentistry students selected from each class in the second to fifth years (N = 200) of Sao Paulo State University, School of Dentistry, Araraquara. The response variables were (i) the working distance between the operator's eyes and the mouth of the dental phantom head, and (ii) visual acuity. The independent variables were the five levels of the Galilean magnification system (naked eye, Galilean loupe simulator without magnification, and Galilean loupes with 2.5x, 3.0x, or 3.5x magnification) and academic year. Visual acuity was measured using a miniature Snellen eye chart inserted into the Class I cavities of the maxillary molars. After verifying the assumptions of normality and sphericity, a mixed repeated measures analysis was performed (alpha = 0.05).Results Statistical significance was found between the "magnification system" and "academic year" for visual acuity (p < 0.001). For the second-, fourth-, and fifth-year participants, there were no significant differences in visual acuity between the naked eye and different magnifications of the Galilean loupes, which were superior to and significantly different from that of the loupe simulator. For the working distance, statistical significance was observed in the interaction between "magnification system" and "academic year" (p = 0.008). For the third-, fourth-, and fifth-year participants, there was no significant difference in the working distance between the naked eye and different magnifications of the Galilean loupes, which were superior to and significantly different from that of the simulator.Conclusion It was concluded that the different magnification levels of the Galilean loupes did not influence the visual acuity or distance between the eyes of the operator and the mouth of the dental phantom head in the evaluated students. (AU) | |
| FAPESP's process: | 21/12031-4 - Magnification and working posture in dental students |
| Grantee: | Júlia Margato Pazos |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 21/13408-4 - Magnification and working posture in dental students |
| Grantee: | Patrícia Petromilli Nordi Sasso Garcia |
| Support Opportunities: | Regular Research Grants |
| FAPESP's process: | 21/13069-5 - Magnification of the Galilean system loupe and visual acuity of dental students |
| Grantee: | Carla Gabriela dos Santos |
| Support Opportunities: | Scholarships in Brazil - Scientific Initiation |