Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants
African Vision and Eye Health
| Field | Value | |
| Title | Comparison of phoropter and trial frame-based von Graefe heterophoria measures in non-presbyopic participants | |
| Creator | Tsotetsi, Annah L. Mathebula, Solani D. | |
| Description | Background: There are several clinical techniques for the subjective measurement of heterophoria. In South Africa, von Graefe (VG) is a commonly used technique to quantify heterophoria using the phoropter.Purpose: The purpose of the study was to investigate the agreement of VG heterophoria measurement using the phoropter and a trial frame.Setting: The study was conducted at an Optometry Clinic, University of Limpopo, South Africa.Methods: Both distance and near horizontal and vertical heterophoria VG measurements were performed on 88 visually-normal university students using the phoropter and trial frame. The handheld rotary prism was used on the trial frame. The 95% limits of agreement in prism diopters were compared using the Bland-Altman statistical test.Results: For distance horizontal heterophoria, the VG means were 0.39 exophoria ± 2.0Δ and 0.38 exophoria ± 1.8Δ with the phoropter and trial frame respectively. The means for near horizontal heterophoria were 3.69 exophoria ± 3.3Δ and 4.13 exophoria ± 3.27Δ with the phoropter and trial frame. For the vertical heterophoria at distance, the means and standard deviations were 0.18 hyperphoria ± 0.74 and 0.13 hyperphoria ± 0.07Δ, while at near vision they were 0.03 hyperphoria ± 0.71 and 0.07 hyperphoria ± 0.71Δ, respectively.Conclusion: Measurement of VG heterophoria testing using the phoropter and trial frame showed a high level of agreement for both distance and near vision performed through the phoropter and a trial frame. For clinical and research purposes, the phoropter and trial frame can be used interchangeably for measuring heterophoria. | |
| Publisher | AOSIS | |
| Date | 2021-11-08 | |
| Identifier | 10.4102/aveh.v80i1.645 | |
| Source | African Vision and Eye Health; Vol 80, No 1 (2021); 9 pages 2410-1516 2413-3183 | |
| Language | eng | |
| Relation |
The following web links (URLs) may trigger a file download or direct you to an alternative webpage to gain access to a publication file format of the published article:
https://avehjournal.org/index.php/aveh/article/view/645/1655
https://avehjournal.org/index.php/aveh/article/view/645/1656
https://avehjournal.org/index.php/aveh/article/view/645/1658
https://avehjournal.org/index.php/aveh/article/view/645/1659
|
|
ADVERTISEMENT
