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New Tablet-Based Written Examination System for Metamorphopsia Quantification.

Hisashi Fukuyama¹, Kazuma Mikami², Yoichi Okita¹

¹Department of Ophthalmology, Hyogo Medical University, 1-1 Mukogawa-cho, Nishinomiya 663-8501, Japan.

Journal of Clinical Medicine

|March 27, 2025

Summary

A new tablet system, Implementing digitization in assessment for metamorphopsia (IDAM), quantifies metamorphopsia severity in patients with epiretinal membrane (ERM) and central serous chorioretinopathy (CSC). IDAM effectively monitors treatment response and aids in at-home patient management.

Keywords:

Amsler chart central serous chorioretinopathy epiretinal membrane metamorphopsia

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Area of Science:

Ophthalmology
Medical Technology
Digital Health

Background:

Metamorphopsia, a visual distortion, impacts patients with epiretinal membrane (ERM) and central serous chorioretinopathy (CSC).
Accurate quantification and monitoring of metamorphopsia are crucial for assessing treatment efficacy.

Purpose of the Study:

To develop and validate a tablet-based system, Implementing digitization in assessment for metamorphopsia (IDAM), for quantifying metamorphopsia.
To assess the utility of IDAM in monitoring treatment-induced changes in patients with ERM and CSC.

Main Methods:

A prospective study involving 31 patients (33 eyes) with ERM or CSC.
Patients used the IDAM system on a tablet to draw perceived line distortions on a grid.
Metamorphopsia scores were derived from line deviation distances, with comparisons made pre- and post-treatment.

Main Results:

Baseline metamorphopsia was detected in 30 eyes using IDAM.
IDAM scores showed significant improvement post-treatment in both ERM and CSC groups (p < 0.001).
A significant reduction in distortion area was observed post-treatment (p = 0.0049).

Conclusions:

The IDAM system provides a quantitative method for evaluating metamorphopsia severity.
IDAM effectively detects treatment responses in patients with macular disorders.
This digital tool holds potential for facilitating remote, at-home monitoring of patients.