Corneal topography and monocular diplopia following near work

Area of Science:

• Ophthalmology
• Optometry
• Corneal Science

Background:

• Monocular diplopia, or double vision in one eye, can significantly impact visual function.
• Previous examinations, including slit lamp biomicroscopy, did not reveal any corneal abnormalities in the affected subject.
• The onset of symptoms was linked to periods of near work.

Purpose of the Study:

• To investigate the underlying cause of monocular diplopia experienced after near work.
• To determine if subtle changes in corneal topography could account for the reported visual disturbance.
• To correlate objective measurements of corneal shape with subjective visual complaints.

Main Methods:

• Detailed analysis of corneal topography was performed on the affected eye.
• Slit lamp biomicroscopy was used for initial examination.
• Ray tracing calculations were employed to model light pathways through the distorted cornea.

Main Results:

• Significant changes in corneal topography were identified as the cause of monocular diplopia.
• The degree of corneal distortion was quantified.
• Ray tracing calculations accurately predicted the location and characteristics of the diplopia.

Conclusions:

• Subtle alterations in corneal topography, not detectable by standard slit lamp examination, can induce monocular diplopia.
• Near work may exacerbate or reveal these corneal changes, leading to visual symptoms.
• Corneal topography and ray tracing are valuable tools for diagnosing vision problems related to corneal shape irregularities.