Highly Aspherical Lenslet (HAL) and Binocular Vision (BV) Disorders [HALT X(T) Study]

Launched by SINGAPORE NATIONAL EYE CENTRE · Mar 3, 2025

Keywords

ClinConnect Summary

The HALT X(T) Study is a clinical trial that aims to understand how special glasses designed to control myopia (nearsightedness) can help children with eye misalignment, known as strabismus. The researchers want to see if these glasses can slow down the progression of myopia in children aged 5 to 12 who have certain types of strabismus. This is important because doctors often feel uncertain about prescribing these glasses to children with such eye conditions.

To participate in this study, children must be between 5 and 12 years old with myopia between -1D and -6D in at least one eye and must have experienced a change in vision over the past year. The study is looking for children with specific types of eye misalignment, such as certain forms of exotropia or esotropia. Participants can expect to wear the myopia control glasses and attend follow-up appointments for assessments. This trial is currently not recruiting participants, but it represents an important step in finding effective treatments for children with these eye conditions.

Gender

ALL

Eligibility criteria

• Inclusion Criteria:
• • Age 5-12 years old Myopia of between -1D and -6D in at least 1 eye Progression of at least 0.5D within the last year Astigmatism less than 2.5D Exotropia Exophoria: horizontal deviation \<40PD Esotropia (good control), Esophoria: horizontal deviation \<40PD Any vertical strabismus: Vertical deviation \<10 PD Intermittent exotropia (good, moderate, poor) Horizontal deviation ≥15 PD, vertical deviation ≤5 PD (?)
• Exclusion Criteria:
• • VA poorer than logMAR 0.2 (6/9.5) in either eye Any other ocular condition (e.g. lens opacity, glaucoma) other than myopia, strabismus or nystagmus) Any medical/neurological condition which would interfere with subjects ability to co-operate with tests and attend follow-up appointments.
• • Plans of surgery for strabismus or nystagmus in the next year Constant XT). Past use of any other from of myopia control treatment (eg. atropine or myopia control glasses or contact lenses) within the last year.