MD Bahauddin Molla¹*, Tariq Reza Ali² and MD Showkat Kabir³

¹Assisstant Professor and Head of the Department, Department of Ophthalmology, Kurmitola General Hospital, Dhaka, Bangladesh
²Associate Professor, (Vitreo-Retina), Bangabandhu Sheik Mujib Medical University, Dhaka, Bangladesh
³Associate Professor, Department of Community Ophthalmology, Bangabandhu Sheik Mujib Medical University, Dhaka, Bangladesh

*Corresponding Author: MD Bahauddin Molla, Assisstant Professor and Head of the Department, Department of Ophthalmology, Kurmitola General Hospital, Dhaka, Bangladesh.

Received: July 25, 2022; Published: September 08, 2022

Abstract

Background: The Tendency Oriented Perimetry (TOP) and Normal Threshold Strategies (NTS) are two widely used procedures of diagnosis in the treatment arena of ophthalmology. But we have not enough data regarding the comparative analysis between these two procedures of TOP and NTS.

Aim of the study: The aim of this study was to establish a correlation between Tendency Oriented Perimetry (TOP) and Normal Threshold Strategies (NTS) by OCTOPUS automated visual field analyzer in diagnosis and monitoring of glaucoma and other neurological lesion.

Materials and Methods: This was a prospective observational study. The comparative case study was conducted at the National Institute of Ophthalmology and Hospital (NIO and H), Dhaka, Bangladesh during the period from January 2003 to December 2004. At the first screening glaucoma suspect patients, established glaucoma and neuro-ophthalmological patients attended at the outdoor of NIO and H were selected for this study. Finally, forty-five eyes of twenty-five subjects were defined in this study for analysis. Data were collected by predesigned questioner and analyzed by SPSS latest version.

Results: The mean time required for test in Tendency Oriented Perimetry (TOP) was 3.01 ± 0.40 minutes and in Normal Threshold (32) was 15.87 ± 2.02 minutes. In our study the comparison of mean sensitivity in tested eye by TOP and NTS (32) strategies were prepared. The mean sensitivity in TOP was 21.07 ± 7.60 and in NTS (32) was 20.01 ± 6.95. The mean defect in TOP was 7.92 ± 7.24 and in NTS (32) was 8.46 ± 7.09 and the mean difference was statistically not significant (p > 0.05).

Conclusion: The study concludes that Tendency Oriented Perimetry (TOP) is an alternative to Normal threshold (32) perimetric technique in the assessment of visual field. Furthermore, TOP strategy is very much time saving and has less fatigue effects both to the patients and perimetrists. So, in screening purpose we can use TOP strategy instead of NTS (32) strategy.

Keywords: Ophthalmology; Tendency Oriented Perimetry TOP; Normal Threshold Strategies

References

1. Kanski JJ. “Clinical ophthalmology; 5^th edition”. Butter Worth-Heinemann (2003): 202 -209.
2. Fankhauser F., et al. “On automation of perimetry”. Graefe's Archive for Clinical and Experimental Ophthalmology (1972): 126-150.
3. Heijl A and Drance SM. “Changes in differential threshold in Patients with glaucoma during prolonged perimetry”. British Journal of Ophthalmology 67 (1983): 512-516.
4. Gonzalez de la Rosa M., et al. “TOP perimetry: a theoretical evaluation”. Vision Res Sup Jermov 36 (1996): 88.
5. Morales J., et al. “Comparison between Tendency-Oriented Perimetry (TOP) and Octopus Threshold perimetry”. Opthalmology 107 (2000): 134-142.
6. Johnson CA., et al. “Fatigue effects in automated perimetry”. Applied Optics 27 (1988): 1030-1037.v
7. Bebie H., et al. “Static perimetry. Accuracy and fluctuations”. Acta Ophthalmology 54 (1976): 339-348.
8. Haider M and Dixon NF. “Influences of training and fatigue on the continuous recording of a visual field differential threshold”. British Journal of Psychology 52 (1961): 227-237.
9. Heijl A. “Time changes of contrast thresholds during automatic perimetry”. Acta Ophthalmology (Copenh) 55 (1977): 696-708.
10. Rabinean PA., et al. “Fluctuations in Threshold and Effects of Fatigue in Automated Static Perimetry (with the OCTOPUS 201)”. Documenta Ophthalmologica Proceedings Series Sixth International Visual Field Symposium 42 (1985): 25.
11. Gonzalez de la Rosa M and Pareja A. “Influence of the “fatigue effect” on the mean deviation measurement in perimetry”. European Journal of Ophthalmology 7 (1997): 29-34.v
12. Gonzalez de la Rosa M., et al. “The mean deviation in the Delphi and 24-2 perimetric programs 1995”. Investigative Ophthalmology 36 (1995): 1588.

Citation

Citation: MD Bahauddin Molla., et al. “Mapping the Tendency Oriented Perimetry (TOP) and Normal Threshold Strategies".Acta Scientific Ophthalmology 5.10 (2022): 12-18.

Copyright

Copyright: © 2022 MD Bahauddin Molla., et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.