Comparison of the position of steep meridian by image guiding system (Verion) and manual marking technique.

Comparison of the position of steep meridian by image guiding system (Verion) and manual marking technique. - Examination of image guiding system's (Verion) effectiveness

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

JPRN

Registry ID

JPRN-UMIN000037098

Enrollment

100

Registered

2019-06-18

Start date

2019-07-01

Completion date

Unknown

Last updated

2026-06-29

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

Conditions

Cataract

Interventions

None listed

Eligibility

Sex/Gender

All

Inclusion criteria

Inclusion criteria: Within cataract patient with over 2.5D corneal astigmatism, patient who went through a surgery with manual marking and image guiding system.

Exclusion criteria

Exclusion criteria: Patient with intraoperative or postoperative complication, amblyopia, maculopathy, glaucoma, or uveitis which affects visual acuity.

Design outcomes

Primary

Measure	Time frame
Preoperatively in the office difference of reference point which was decided manually under the slitlamp and 90 degrees position by image guiding system were measured and ratio of under 5 degrees and 10 degrees were calculated respectively. Then, difference between steep meridian decided manually and by image guiding system (Verion) were measured preoperatively and postoperatively. Ratio of errors under 5 degrees and 10 degrees are calculated respectively. Preoperative and postoperative visual acuity, refractive examination value, corneal astigmatism, and toric axis rotational error were assessed.	—

Measure

Time frame

Preoperatively in the office difference of reference point which was decided manually under the slitlamp and 90 degrees position by image guiding system were measured and ratio of under 5 degrees and 10 degrees were calculated respectively. Then, difference between steep meridian decided manually and by image guiding system (Verion) were measured preoperatively and postoperatively. Ratio of errors under 5 degrees and 10 degrees are calculated respectively. Preoperative and postoperative visual acuity, refractive examination value, corneal astigmatism, and toric axis rotational error were assessed.

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Countries

Japan

Contacts

Public ContactTsutomu Ohashi

Medical Corporation Ohashi Eye Center President

ohashi@rainbow.ne.jp011-864-4656

Outcome results