Retraction: Colonic Gallstone Ileus: A Rare Etiology of Large Bowel Obstruction.

[This retracts the article DOI: 10.7759/cureus.20338.

"Smart Optometry" phone-based application as a visual acuity testing tool among pediatric population.

Objectives: To evaluate the validity of a smartphone-based application for visual acuity (VA) testing in children and to compare parent and clinician-performed VA to standard VA assessment.

Methods: A cohort of 100 children aged <18 years old was recruited. Subjects were randomly assigned to either start with conventional distance VA chart screening or the smartphone VA assessment twice by both the clinician and the caregiver if applicable.

Colonic Gallstone Ileus: A Rare Etiology of Large Bowel Obstruction.

Large bowel obstruction is a surgical emergency that requires prompt diagnosis and management. It is frequently caused by colon cancer. However, the common benign etiologies include volvulus, hernia, adhesions, and strictures.