ArticleJournal of optometry
Preliminary evaluation of smartphone-based addition measurement in a presbyopic population.
Article in Journal of optometry. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
2 citing papers in PubMed.
- Myopia Prescription Based on Smartphone App: A Feasibility Study in Africa.Translational vision science & technology · 2026Article
- Accuracy and precision of a sphero-cylindrical over-refraction app for smartphones.Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists) · 2025Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo evaluate the viability and accuracy of a mobile application (app) for subjective measurement of presbyopic addition, comparing its performance with standard clinical methods.
methodsTwenty presbyopic subjects (aged 52 to 64) participated in the study. Clinical measurements of sphero-cylindrical refraction and its correction was achieved using trial lenses. Addition was also clinically measured using a standard and a tentative method. A set of 12 trial lenses ranging from 0 to 2.75 D were randomly put on top of the far distance correction, generating the correction addition correction or different levels of under/over correction of the addition. Participants then used a smartphone-based app to subjectively determine binocularly their near point (NP) using a push-up method while looking at a blue stimulus that rescaled as a function of the face-device distance measured using the front camera of the device. For each induced level of under/over correction of the addition, participants completed three measurements of their near point.
resultsLinear regression analysis showed a strong correlation (R² = 0.82) between app-measured and clinical addition values. Bland-Altman analysis revealed a mean over estimation of -0.22± 0.38 D with a limit of agreement of ±0.74 D of the near correction. Cumulative error analysis indicated that 61.7 % of app measurements were within 0.25 D of clinical values, and 82.5 % within 0.50 D
conclusionsA smartphone-based subjective measurement of presbyopic addition can potentially be used to assess the addition needed to detect the under or over corrected addition in full presbyopic subjects.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.