The impact of smartphone use on accommodative functions: pilot study

Area of Science:

• Ophthalmology and Vision Science
• Human-Computer Interaction

Background:

• Limited and inconclusive evidence exists regarding smartphone use's impact on visual accommodation.
• Previous studies suggest short-term negative effects on the near triad and visual symptoms.
• Emerging reports link excessive smartphone use to acute acquired concomitant esotropia (AACE).

Purpose of the Study:

• To investigate the immediate effects of habitual smartphone use on accommodative measures.
• To assess changes in accommodative facility (AF), near point of accommodation (NPA), and near point of convergence (NPC) after smartphone usage.

Main Methods:

• A pilot study involving 18 participants aged 16-40 years.
• Measurements of AF, NPA, and NPC were taken before and after 30 minutes of smartphone use.
• Data were analyzed using non-parametric statistical tests with Bonferroni correction for post-hoc analysis.

Main Results:

• While some measures showed apparent changes (e.g., improved AF, worsened NPA and NPC), these were not statistically significant after Bonferroni correction (p > 0.07).
• The study found no statistically significant difference in accommodative and convergence measures before and after smartphone use.
• Results contradict some existing literature suggesting negative impacts of smartphone use on the near triad.

Conclusions:

• This pilot study indicates no significant short-term impact of 30 minutes of smartphone use on accommodative and convergence measures.
• Limitations in the current pilot study and previous research necessitate further investigation.
• Future research should address limitations to enhance understanding of smartphone use effects on visual function.