What question did this study set out to answer?

The aim is to assess the long-term stability of the dark focus of accommodation over a year.

March 21, 2026

Long‐Term Stability of the Dark Focus of Accommodation

Key Points

The aim is to assess the long-term stability of the dark focus of accommodation over a year.
Monitored five subjects over a year
Measured the dark focus of accommodation in darkness
Analyzed individual mean values and variability
Subjects maintained a stable mean dark focus throughout the year
Individual patterns of dark focus variability were observed
Data supports using the dark focus to correct night and empty-field myopia

Abstract

ABSTRACT For 1 year we monitored the stability of the accommodative state assumed in darkness (the dark focus) of five subjects. Our results are similar to previously reported individual mean values. The magnitude and pattern of the variability in the dark‐focus also demonstrate individual differences. Despite this individual variability, all five subjects oscillated around a stable mean dark‐focus value throughout their respective measurement periods. This study indicates the feasibility of using the dark‐focus as a basis for correcting the anomalous myopias, in particular night and empty‐field myopia.

Bookmark

Long‐Term Stability of the Dark Focus of Accommodation

Key Points

Abstract

Cite This Study

Also Consider

Also Consider