A Study on Ocular Biometric During Accommodation.
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2019, Vol 4, Issue 5
Abstract
We performed a biometric study that used A-mode ultrasonography on 75 young subjects during ocular accommodation. The subjects between the age group of 18 to 30 years were divided into three groups depending upon their refractive status. Group A comprised of patients with no refractive status (Emmotropes), Group B included patients suffering from Myopia less than -5.0 DSph and Group C includes patients of Hypermetropia less than + 5.0 DSph . After carrying out initial evaluation, A Scan Ultrasonography was performed on the right eye while left eye wearing full refractive correction for distance was focused at a distance of 6 m, 33 cm, 12.5 cm and 33 cm with additional +3 D correction to offset any accommodative effect. The parameters measured were AC depth, lens thickness and axial length in all the Groups A, B & C in the right eye while the left eye, wearing corrective spectacles, focused at distances of 6 m, 33 cm, and 33 cm with an additional correction of +3 D to offset any accommodative effect..In Group A, we measured the same parameters i.e. AC depth, lens thickness, and axial length in the right eye while the left eye, wearing full corrective spectacles during all procedures, focused at distances of 6 m, 33 cm, and 33 cm with an additional correction of +3.0 D to offset any accommodative effect. During accommodation, decreased AC depth and thickening of the lens with increasing level of accommodation were noted in all Groups A, B and C cases. In group A, axial length significantly increased an average of 0.06 +/- 0.01 mm (P < .0005) while the left eye focused at a distance of 33 cm. There were no significant changes with the additional +3.0 D (P < 0.05). In group B & C, axial length significantly increased an average of 0.05 +/- 0.01 mm (P < .0005) when the left eye focused at a distance of 33 cm, and there was further significant elongation of 0.05 +/- 0.01 mm when the left eye focused at a distance of 12.5 cm. Collectively, these results suggest that axial length increases along with changes in the lens and AC depth during ocular accommodation.
Authors and Affiliations
Dr. Ashok Rathi
Keywords
Related Articles
- EP ID EP574389
- DOI -
- Views 150
- Downloads 0
A Case Report: Management of Blunderbuss Canal Using Tailor Made Gutta percha Obturating Technique.
This clinical report aims to report management of Blunderbuss canal applied to 11 of a healthy 11-year-old female after a trauma. Clinical inspection of the tooth showed fractures involving incisal edge and mesial angle....
Significance of Ultrasound Finding of Minimal Free Fluid in Pelvis in Paediatric Blunt Trauma Abdomen Patients: A Retrospective Study and Review of Literature.
Aim: The aim of this study is to evaluate the significance of the minimal pelvic free fluid finding on ultrasound. Method - The clinical and imaging data of 102 patients with blunt trauma abdomen were evaluated retrospec...
Anxiety and Depression and Quality of Life in Young Breast Cancer Patients Receiving Radiotherapy Treatment and Their Caregivers
The most commonly diagnosed cancer for women is breast cancer and the most common treatment for primary breast cancer is breast surgery and adjuvant systemic treatments1. This is to reduce the chance of local and distant...
Women’s Satisfaction in Early versus Delayed Post caesarean (Under Spinal Anaesthesia) Feeding: An Randomized Controlled Trial at Tertiary Care Center Jaipur Rajasthan.
Background: The early postoperative feeding after caesarean section (C- section) has remained controversial. This study was designed to evaluate the effect of early postcaesarean feeding on patient postoperative satisfac...
Evaluation of Nontraumatic Aneurysmal Subarachnoid Hemorrhage - A Retrospective Cross-sectional Analysis
Introduction: Primary (nontraumatic) subarachnoid hemorrhage (SAH) is an important complication of intracranial aneurysms. Multiple intracranial aneurysms are discovered in 15% to 35% of patients with aneurysm who presen...