Effect of against-the-rule myopic astigmatism monovision in bilateral pseudophakia

Comparison of two spectacle-induced monovisions, simple myopic monovision and against-the-rule myopic astigmatism monovision, for near, intermediate, distant visual acuities, near stereopsis, Thai-reading speed in bilateral monofocal pseudophakic Tha

Status

Recruiting

Phases

Unknown

Study type

Interventional

Source

TCTR

Registry ID

TCTR20120000016

Enrollment

Registered

2012-10-29

Start date

2012-11-01

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

bilateral pseudophakia monovision against the rule astigmatism monovision visual acuities near stereopsis thai text reading speed

Interventions

spectacles&#45

induced monovision aimming the target of emmetropia (0.00) for the dominant eye and simple myopia (&#45

2.00) for the non&#45

dominant eye,spectacles&#45

induced monovision aimmin the target of emmetropia (0.00) for the dominant eye and against&#45

the&#45

rule myopia (&#45

1.00&#44

&#45

1.00 x 90) for the non&#45

dominant eye

Experimental Procedure/Surgery,Experimental Procedure/Surgery

Emmetropic (0.00) + spherical myopic (&#45

2.00) monovision,emmetropic (0.00) + against&#45

rule myopic astigmatism (&#45

1.00 x 90) monovision

Eligibility

Sex/Gender

All

Age

45 Years to 70 Years

Inclusion criteria

Inclusion criteria: Post-operative duration of the recent cataract surgery > 3 mo Uneventful cataract surgery Best corrected distance visual acuity better or equal to 20/40 in either eye

Exclusion criteria

Exclusion criteria: Intolerance to glasses and trial frames set Unstable IOLs Distort pupil or Non-reactive pupil, Pupil size asymmetry ≥ 1 mm Strabismus that prevent accommodation Optical media opacity e.g., corneal scar, PCO Other disease affecting corneal regular astigmatism > 3 diopter, irregular astigmatism, e.g., keratoconus, pellucid marginal degeneration, post-penetrating keratoplasty, advanced pterygium Any previous refractive surgery including LASIK, PRK Ocular surface disease that may affect the visual acuity Any retinal diseases Thai illegibility Saccade disability Oblique astigmatism of manifested refractive error

Design outcomes

Primary

Measure	Time frame
Visual acuities at distant, intermediate, near distance Nov 2012-Jun 2013 logMAR chart at different distances representative of distant, intermediate and near distances,Near stereopsis Nov 2012-Jun 2013 Vectographic Titmus / Second of arcs,Average Thai-text reading speed Nov 2012-Jun 2013 2 sets of Thai-texts / characters per min	—

Secondary

Measure	Time frame
Patient satifaction nov 2012-Jun 2013 categorical scale of Satisfied/Acceptable/Dissatified	—

Contacts

Public ContactPoramaet Laowanapiban

Mettapracharak Hospital

Outcome results

None listed

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

Effect of against&#45;the&#45;rule myopic astigmatism monovision in bilateral pseudophakia