Characteristics of the Vergence Responses of Binocularly Normal Subjects After a Vision Therapy Protocol
Vision Disorders, Eye; Movement Disorder (Binocular), Vision Therapy
About this trial
This is an interventional treatment trial for Vision Disorders focused on measuring Vergence, Vision Therapy, Binocular Vision
Eligibility Criteria
Normal binocular and accommodative subjects will participate in the study. All subjects have to fulfill the inclusion criteria. All evaluations will consist of the following objective and subjective optometric tests, which will be executed for all participants.
- Monocular and binocular VA at near and distance with their habitual correction
- Refractive error measured with the Grand Seiko WAM-5500 Autorefractor
- Cover Test at near (40 cm)
- Near Point of Accommodation
- Near Point of Convergence
- Vergence Facility Test at near (40 cm)
- Monocular and binocular Accommodation Facility Test at near (40 cm)
- Negative and Positive Relative Accommodation Test (ARN and ARP)
- Random Dot 2 Stereo acuity Test
- CISS questionnaire
- Fusional Vergence Amplitude using both subjective and objective methods
Exclusion Criteria:
- having eye surgery
- having an eye pathology
- having a binocular or an accommodative disorder
- using orto-K lenses
Sites / Locations
- Cristina Rovira-GayRecruiting
Arms of the Study
Arm 1
Arm 2
Experimental
Placebo Comparator
Classical Vision Therapy Treatment: vision therapy exercises for fusional vergence abilities
Eye Movement Therapy Treatment: vision therapy placebo exercises not improve fusional vergence
The Experimental Group (EG) it consist in a Classical Vision Therapy Treatment. This group will do weekly office-based therapy of 45 minutes of visual exercises during 12 weeks. The office-based done by the EG consists of a vergence therapy and its protocol will follow Scheiman's Protocol and Indications. The exercises do not tough the eye or use drugs. They are just visual training exercises that improve fusional convergence and divergence response.
The Control Group or Placebo Group consist in a Control: Eye Movement Therapy Treatment. This group will do weekly office-based placebo therapy of 15 minutes during 12 weeks of visual exercises. This placebo therapy will consist of smooth-pursuit and discrimination exercises that do not influence vergence response. The exercises do not tough the eye nor use drugs. They are just visual training exercises that do not improve fusional vergence response as they improve smooth-pursuit eye movements.