The Changes Under Different Accommodation of Anterior Eye and 3D Crystal Reconstruction.

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Conditions studied: Accommodation

In brief

Accommodation is defined as a dynamic change in the overall refractive power of the eye during near fixation. Despite extensive investigations, the exact nature of human accommodation remains controversial. And recent alternative theories question the original concept of accommodation.Different experts have put forward different hypotheses. The age-related changes that underlie presbyopia are also not fully understood.Because of these unanswered questions, the topic of regulation and presbyopia remains a focus of research.

Key facts

Study ID

NCT06704503

Run by

Second Affiliated Hospital, Zhejiang University, School of Medicine

People needed

120

Starts

2024-11-27

Expected to finish

2028-12-31

Last updated by the study team

2025-05-23

Who can join

Age: 20 and older, up to 80. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• · Patients with astigmatism ≤-1.50D and best corrected visual acuity ≥4.9

You may not qualify if…

• Patients with other systemic diseases
• Patients with a history of eye surgery
• Patients with intraocular lens or aphakia
• Patients with strabismus and amblyopia
• Pregnant or lactating women
• People with mental disorders or neurological diseases who cannot cooperate with the examination

Where it is running

• Second Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China (enrolling)
• Second Affiliated Hospital, Zhejiang University School of Medicine — Hangzhou, Zhejiang, China

Full record on ClinicalTrials.gov

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