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A Systematic Evaluation of the Impact of Spherical Aberration Levels on Visual Quality and Depth of Field

A Systematic Evaluation of the Impact of Spherical Aberration Levels on Visual Quality and Depth of Field

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ChiCTR
Registry ID
ChiCTR2600118247
Enrollment
Unknown
Registered
2026-02-03
Start date
2026-02-20
Completion date
Unknown
Last updated
2026-02-09

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

None

Interventions

Young Adult Group:None
Older Adult Group:None

Sponsors

Tianjin Medical University Eye Hospital
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 75 Years

Inclusion criteria

Inclusion criteria: Young Adult Group: Healthy volunteers. Inclusion criteria: 1. Signed written informed consent; 2. Aged 18–35 years; 3. Astigmatism = 20/20; 5. No history of ocular disease. Older Adult Group: Patients who underwent cataract surgery with zero spherical aberration intraocular lens implantation at our hospital. Inclusion criteria: 1. Signed written informed consent; 2. Aged 55–75 years; 3. Astigmatism = 20/25; 5. No history of other ocular diseases.

Exclusion criteria

Exclusion criteria: 1. Diagnosed with glaucoma, macular degeneration, or diabetic retinopathy; 2. History of neurological disorders affecting visual quality; 3. Inability to cooperate with the relevant examinations.

Design outcomes

Primary

MeasureTime frame
Subjective Depth of Field;Modulation Transfer Function;—

Secondary

MeasureTime frame
Contrast sensitivity;Defocus curve;Strehl ratio;Objective scatter index;Objective Depth of Field;—

Countries

China

Contacts

Public ContactTian Fang

Tianjin Medical University Eye Hospital

tianfang1216@126.com+86 22 86428703

Outcome results

None listed

Source: ChiCTR (via WHO ICTRP) · Data processed: Feb 15, 2026