A Novel Hand Held Instrument for Quantitating Diplopic Visual Fields

Diplopia assessment is critical in evaluating conditions including: thyroid associated orbitopathy (TAO), orbital trauma, and idiopathic orbital inflammation (IOI) among others. Currently diplopia is assessed using: qualtitative clinical assessment, prism quantitatition of deviation, and techniques like Goldmann perimeters which though accurate, require specialized unavailable instruments. We developed a simple hand-held instrument (diplopometer) that allows reproducible quantitative assessment of the diplopic field. It has the resolution and reproducibility of the most sophisticated instruments.