Baseline Thai version of the MNREAD acuity chart measures for normally sighted Thai subjects from childhood to old age

Status

Recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20211223002

Enrollment

200

Registered

2021-12-23

Start date

2021-08-09

Completion date

Unknown

Last updated

2026-08-03

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

Conditions

Healthy participant Best correct visual acuity 20/20 in near and distant reading acuity, maximum reading speed, critical print size, reading performance

Interventions

- Healthy volunteer - Age 8-14 years old - Studying grade 2 - 8 (20 persons per grade) - Best corrected visual acuity

BCVA 0.00 logMAR - Astigmatism less than 1.00 Diopter - No intraocular pathology and strabismus - No reading problem - Normal extraocular muscle movement - Inform consent,- Healthy volunteer - Age 1

40 persons - Best corrected visual acuity

BCVA 0.00 logMAR - Astigmatism less than 1.00 Diopter - No intraocular pathology and strabismus - No reading problem - Normal extraocular muscle movement - Inform consent,- Healthy volunteer - Age 6

20 persons - Best corrected visual acuity

BCVA 0.00 logMAR - Astigmatism less than 1.00 Diopter - No intraocular pathology and strabismus - No reading problem - Normal extraocular muscle movement - Inform consent

Screening,Screening,Screening

School age group ,Working age group,Old age group

Eligibility

Sex/Gender

All

Age

8 Years to 69 Years

Inclusion criteria

Inclusion criteria: 1. Age 8-69 years 2. Best corrected visual acuity 0.00 logMAR in both eyes (near and distance) 3. Cylendrical power less than -1.00 Diopter 4. Neither eye disease nor strabismus 5. no reading abnormality 6. no extraocular muscle movement abnormality 7. inform consent

Exclusion criteria

Exclusion criteria: not follow inclusion criteria

Design outcomes

Primary

Measure	Time frame
Critical print size;CPS 4 weeks after end of the examination Measure reading time(sec) in each sentence (from logMAR 1.3 t0 -0.2) then convert to reading speed (words/minute) and plot graph for CPS (logMAR);smallest print size yielded 90% of MRS(words/minute),Maximum reading speed; MRS 4 weeks after end of the examination Maximum reading speed (words per minute, wpm) was estimated as plateau of fitted curve (MNREAD graph previously plot),Reading acuity (RA) 4 weeks after end of the examination Reading acuity(logMAR) was calculated by adding 0.01 logMAR to the smallest tested print size for each error made in the test	—

Measure

Time frame

Critical print size;CPS 4 weeks after end of the examination Measure reading time(sec) in each sentence (from logMAR 1.3 t0 -0.2) then convert to reading speed (words/minute) and plot graph for CPS (logMAR);smallest print size yielded 90% of MRS(words/minute),Maximum reading speed; MRS 4 weeks after end of the examination Maximum reading speed (words per minute, wpm) was estimated as plateau of fitted curve (MNREAD graph previously plot),Reading acuity (RA) 4 weeks after end of the examination Reading acuity(logMAR) was calculated by adding 0.01 logMAR to the smallest tested print size for each error made in the test

—

Secondary

Measure	Time frame
Effect of age sex and education to reading performance 4 weeks after end of the examination Plot MNREAD curve using information in each age group(RA MRS CPS) and univariate-multivariate regression model	—

Countries

Thailand

Contacts

Public ContactYonlada Duenpen

Chiangmai university

yonladaduenpen@gmail.com0956975636

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026