Loss of Vision After Trauma

The Causation Question, Stated Precisely

Three things must line up before visual loss is attributed to trauma: a mechanism capable of producing the deficit, objective findings consistent with that mechanism, and a timeline in which the deficit follows the incident rather than preceding it. A claim can fail any of the three — a mechanism too trivial for the claimed damage, structures too normal for the claimed blindness, or records showing the deficit predated the event. The general approach is described on the causation expert page; this page addresses its application to post-traumatic vision claims specifically.

Pre-Existing Disease Versus Traumatic Change

Many eyes carry silent disease: early cataract, glaucoma, diabetic retinopathy, macular degeneration, or lifelong amblyopia (reduced vision in one eye from childhood visual development, often undiagnosed). An incident can bring a claimant to detailed eye examination for the first time in years, and findings discovered then are easily — sometimes wrongly, sometimes rightly — attributed to the incident. Pre-incident optometry and ophthalmology records are therefore the most valuable documents in the file, and obtaining them, going back years, should be an early priority; see what records to provide. Where trauma aggravated pre-existing disease, the honest answer is apportionment between the two, a familiar exercise in California workers' compensation under the apportionment statutes and equally relevant to civil damages.

Objective Testing: What the Eye Shows Regardless of What the Patient Says

Several examinations produce evidence that does not depend on the claimant's answers:

• OCT (optical coherence tomography) — cross-sectional imaging of the retina and optic nerve at near-microscopic resolution. It shows structural damage, atrophy, or their absence, and serial scans show change over time.
• Pupillary testing — substantial one-sided damage to the retina or optic nerve produces a relative afferent pupillary defect (RAPD), an involuntary sign no effort can produce or suppress. Profound claimed monocular vision loss with no RAPD demands explanation.
• Electrophysiology — tests that record the retina's and brain's electrical responses to visual stimuli, assessing the visual pathway with limited reliance on the claimant's participation.
• Automated visual fields — perimetry (such as Humphrey testing) is technically subjective, but it contains built-in reliability indices, and non-physiologic patterns are recognizable.

The interplay between structure and claimed function is the analytic core: a claimed deficit should have a visible or measurable footprint proportionate to it. Attorneys wanting more depth on these tools can consult OCT evidence and evaluating vision loss claims.

Non-Organic Overlay

Some claimants report vision loss that objective testing cannot confirm. The clinical term is non-organic (or functional) visual loss, and it spans a spectrum from unconscious symptom amplification to deliberate malingering — a distinction of intent that an ophthalmologist generally cannot make and should not casually assert. What examination can do is document the inconsistency itself: intact structures on OCT, normal pupils, normal electrophysiology, non-physiologic field patterns, or observed behavior incompatible with the claimed deficit. Importantly, non-organic overlay can coexist with genuine injury — a real but modest deficit exaggerated in reporting — and a careful opinion separates the confirmed component from the unconfirmed remainder rather than dismissing the whole claim.

The Honest Limits of Retrospective Causation Analysis

Retrospective analysis is bounded by the records that exist. If no examination preceded the incident, the pre-incident baseline is inferred, not known. If early post-incident records omit key findings, they cannot be reconstructed. Some conditions genuinely attributable to remote trauma emerge only after years, while others discovered after trauma were silently present before it — and in a minority of cases the record simply does not permit a confident answer either way. An expert's credibility rests on saying so when it is true; an opinion that overreaches the record serves neither side once tested. The examination and reporting framework for these evaluations is described under independent medical examination.

What Attorneys Should Provide

Pre-incident eye and primary-care records going back years; all post-incident records with imaging in native form rather than report summaries; prior claims or disability records bearing on vision; the incident description; and, for examinations, authorization for the full battery of objective testing. The earlier the complete file arrives, the more definitive the analysis can be.

Frequently Asked Questions