[Bilateral blindness after injury in a riding horse].

The research article talks about a case of bilateral blindness on a 5-year-old Hanoverian gelding horse which happened due to a crash that injured the cornea of the horse’s eye. The study further investigates the clinical, pathological, as well as electroretinographic findings related to the blindness incident which is linked to traumatic optic nerve degeneration.

Case Background

• The study presents the case of a Hanoverian gelding horse, aged 5 years which was diagnosed with bilateral blindness due to corneal opacity.
• The incident reportedly occurred about 12 months prior to the examination, when the horse had an accident resulting in a head injury and damage to the cornea.

Methodology and Findings

• The researchers then conducted a series of tests to document the clinical, electroretinographic, pathohistologic and ultrastructural lesions of both eyes, including the optic nerves.
• The ophthalmoscopic examination revealed pigment disruption of the non-tapetal fundus adjacent to the optic discs on the horse’s eyes.
• This disruption was morphologically correlated with areas of degeneration and atrophy in the retina.

Evidence of Optic Nerve Degeneration

• The study found evidence of an accumulation of visible pigment in certain areas of the eye.
• This accumulation was morphologically characterized by hypertrophy of the pigment epithelium, increased intracellular pigment accumulation, and by migration of pigment cells into the inner lamina of the retina.
• As a result of severe atrophy of the retinal neuronal layer, a traumatic degeneration of the optic nerve was identified.

Conclusion

• This study highlights the potential dangers of accidents involving horses, especially where injury to the eyes can lead to severe consequences such as bilateral blindness.
• The results also provide valuable information in terms of medical examination and prognosis for similar cases in the equine population.