Glaucoma

Glaucoma is one of the more misunderstood eye claims at the VA, and the misunderstanding usually costs the veteran a rating. The diagnosis itself is not what carries the percentage. Glaucoma is rated under 38 CFR § 4.79 on the resulting visual impairment, the loss of visual acuity, the loss of visual field, or both. You can have a serious, progressive optic-nerve disease, be on daily drops for years, and still see a low number on the decision if the only thing the examiner measured was central acuity.

That is the central trap. Glaucoma damages vision from the periphery inward. The disease eats the outer field first and spares the central acuity until late. A claim that only measures how well you read the eye chart understates the disability, sometimes by a lot, because the field defect is where the impairment lives. The fix is perimetry, formal visual-field testing by an instrument like the Goldmann perimeter or an automated equivalent, and a claim that only has best-corrected acuity in the file is a claim missing half its evidence.

There is also a floor most veterans do not know about. For open-angle glaucoma under DC 6012, there is a minimum 10 percent evaluation whenever continuous medication is required to control the condition. That alone changes the calculus: if you are putting drops in every day to keep your eye pressure down, a zero rating is not the floor. This page walks through DC 6012 and DC 6013, how the General Rating Formula for Diseases of the Eye converts field and acuity loss into a percentage, the medication minimum, the C&P perimetry mechanics that decide most of these cases, and the secondary chains from diabetes and steroid use.

TL;DR

• Glaucoma is rated under 38 CFR § 4.79, under DC 6012 (open-angle glaucoma) and DC 6013 (other / juvenile glaucoma). The rating comes from the resulting visual impairment, not the diagnosis.
• Visual impairment is evaluated under the General Rating Formula for Diseases of the Eye, based on impairment of visual acuity, impairment of visual field, or both, whichever produces the higher evaluation.
• Open-angle glaucoma (DC 6012) carries a minimum 10 percent evaluation when continuous medication is required to control it.
• Glaucoma damages the peripheral field first. A claim that measures only central acuity, and skips perimetry, understates the disability.
• Visual field loss is measured by perimetry (Goldmann or an automated equivalent). Visual acuity is best-corrected acuity. Both feed the rating formula.
• Secondary chains under § 3.310: glaucoma secondary to diabetes, to chronic corticosteroid use for a service-connected condition (steroid-induced glaucoma), or to ocular trauma. Diabetic veterans often develop it alongside retinopathy.
• In Claim Raven's analysis of 500 BVA glaucoma cases, 19.0% were granted, 28.8% were remanded, and 52.2% were denied. Of the 385 cases with a C&P adequacy determination, 47.0% had the exam flagged as inadequate.

How Glaucoma Is Actually Rated: The Visual-Impairment Path

The single most important thing to understand about a glaucoma claim is that DC 6012 and DC 6013 are not standalone payment schedules. They are entry points into the General Rating Formula for Diseases of the Eye under 38 CFR § 4.79. The diagnostic code identifies the disease. The rating comes from the visual impairment that disease produces.

The formula evaluates impairment along two axes:

• Impairment of visual acuity, measured as best-corrected central acuity (how well you see the chart with glasses or contacts that correct refractive error).
• Impairment of visual field, measured by perimetry, the extent of the field you can still see.

The rule that matters: the condition is rated on whichever axis produces the higher evaluation. If your central acuity is still decent but your peripheral field has collapsed, the field-loss evaluation governs. This is exactly the situation glaucoma creates, and it is why an acuity-only exam is so dangerous to the claim.

The acuity side runs on a table that pairs the corrected vision in each eye and assigns a percentage. The field side runs on the average concentric contraction of the visual field or on specific field defects, converted to a percentage through the formula. I am not going to invent specific tier numbers here, because the acuity-pairing and field-conversion tables in § 4.79 and § 4.77 are detailed and the exact percentage depends on the measured values. The point to hold onto is structural: glaucoma is a visual-impairment rating, and visual-field loss is usually the higher of the two evaluations.

DC 6012 and DC 6013: What the Codes Cover

Two diagnostic codes carry glaucoma under § 4.79.

DC 6012, Open-angle glaucoma. This is the common adult form, the slow-pressure, slow-damage disease that progresses over years. The rating runs through the General Rating Formula based on visual impairment, with one critical addition discussed in the next section: a minimum 10 percent evaluation when continuous medication is required.

DC 6013, Glaucoma other than open-angle (including juvenile and other forms). This code covers the forms outside the open-angle category. It is also rated on resulting visual impairment under the General Rating Formula. The medication-minimum language is specific to open-angle glaucoma under DC 6012, so do not assume the 10 percent floor automatically rides along with a DC 6013 rating in the same way. Where the form of glaucoma is documented, the diagnostic code should track the diagnosis.

In both codes, the mechanism is identical: the optic nerve sustains damage from elevated intraocular pressure (or pressure that is high relative to what that nerve can tolerate), and that damage shows up as field loss long before it shows up as acuity loss. The rating follows the damage.

The 10 Percent Medication Minimum: The Floor Most Veterans Miss

Here is the lever that gets left on the table most often in open-angle glaucoma claims. Under DC 6012, when continuous medication is required to control the condition, there is a minimum 10 percent evaluation.

Read that literally. If a veteran is on a daily pressure-lowering regimen, drops every morning, drops every night, whatever the ophthalmologist prescribed to keep the intraocular pressure in range, that ongoing medication requirement establishes a 10 percent floor for service-connected open-angle glaucoma. It does not matter that the visual field on the day of the exam looked preserved. The medication requirement itself is the basis.

This matters because early and well-controlled glaucoma frequently produces normal or near-normal field and acuity findings. The drops are working; that is the point of the drops. An examiner who measures field and acuity, finds them within normal limits, and assigns a noncompensable rating has missed the regulation. If the condition is service-connected open-angle glaucoma and continuous medication is required, the rating should not fall below 10 percent.

The evidence that establishes this is simple and it is the evidence veterans already have: the prescription record, the ophthalmology notes documenting that medication is required to control the pressure, the pharmacy refill history. A claim that includes the medication record gives the rater what they need to apply the floor. A claim that documents only the field and acuity exam invites the noncompensable rating the regulation was written to prevent.

Why Visual-Field Testing Decides These Cases

Glaucoma is a peripheral-field-first disease. The optic-nerve fibers it damages early are the ones carrying information from the outer field. Central acuity, the function the standard eye chart measures, is preserved until the disease is advanced. A veteran can have substantial glaucomatous field loss, real, ratable, disabling loss, and still read 20/25 on the chart.

This is the mechanical reason an acuity-only C&P exam understates glaucoma. The rating formula takes the higher of the acuity evaluation and the field evaluation. If the field was never measured, the field evaluation defaults to whatever the file supports, which is often nothing, and the rating collapses onto the acuity number alone. The disability is real, the formula would capture it, but the measurement that triggers it never happened.

Visual-field loss is measured by perimetry. The Goldmann perimeter is the classic instrument; automated perimetry (such as the Humphrey field analyzer) is the modern equivalent the VA commonly uses. The test maps the boundaries of the field you can still see and the defects inside it. 38 CFR § 4.77 governs how the measured field is converted into a percentage of impairment, typically through the average concentric contraction across meridians or through the size of the remaining field.

The practical takeaway for the veteran: a glaucoma C&P exam that does not include formal visual-field perimetry is incomplete on its face. The examiner who records "visual acuity 20/30 bilaterally, glaucoma controlled on medication" and stops there has not produced an exam adequate to rate the field-loss axis. That is a defect worth flagging, and as the statistics below show, it is a defect the Board flags often.

C&P Exam Mechanics: What the Eye Examiner Has to Measure

The glaucoma C&P exam should follow the DBQ for eye conditions and produce findings on both axes of the rating formula. A complete exam records:

• Best-corrected central visual acuity for each eye, distance and near, with the correction in place.
• Formal visual-field testing (perimetry) for each eye, the field extent and any defects, by Goldmann or automated equivalent, with the printout or numeric results in the record.
• Intraocular pressure measurements.
• Optic-nerve assessment, including cup-to-disc ratio and any documented optic-nerve damage or thinning.
• Medication status, specifically whether continuous medication is required to control the condition (this is the trigger for the DC 6012 minimum).
• Whether the diagnosis is open-angle or another form, which determines DC 6012 versus DC 6013.

When all of these are present, the rater can evaluate both the acuity axis and the field axis and assign whichever is higher, and can apply the medication minimum where it applies. When the exam is thin, when the field test is missing, when the medication requirement is not addressed, the rater defaults to the acuity number and the field-loss and medication-floor pieces fall out. Each missing component is a potential opening for a rating that did not get assigned the first time.

If your exam is coming up, C&P exam prep for eye and glaucoma DBQs is worth working through so you know what the examiner is supposed to test and can flag it on the spot if perimetry gets skipped.

Secondary Chains: Where Glaucoma Connects

Glaucoma frequently arises as a secondary condition. Under 38 CFR § 3.310, secondary service connection can be granted for a condition caused by a service-connected disability or aggravated by one (Allen v. Brown). The common glaucoma chains:

Glaucoma secondary to diabetes. Diabetic veterans carry elevated risk of glaucoma, and it often develops alongside diabetic retinopathy. A veteran with service-connected diabetes who later develops glaucoma should have the secondary theory developed, with an ophthalmology opinion tying the glaucoma to the diabetic disease process. Because the eye complications of diabetes tend to cluster, the retinopathy and glaucoma claims are often best worked together.

Steroid-induced glaucoma. Chronic corticosteroid use, oral, inhaled, or topical, can raise intraocular pressure and produce glaucoma. When a veteran takes long-term corticosteroids to treat a service-connected condition (a service-connected inflammatory, respiratory, or autoimmune disease, for example), and develops glaucoma as a result, that is a textbook secondary chain. The nexus opinion has to connect the steroid regimen to the pressure rise and the optic-nerve damage.

Glaucoma secondary to ocular trauma. A documented in-service eye injury can produce glaucoma later through damage to the eye's drainage structures (traumatic or angle-recession glaucoma). The longer the interval between the trauma and the glaucoma diagnosis, the more the nexus opinion has to do to explain the mechanism and the time course.

For any of these, the standard for the nexus opinion is the same one that governs every secondary claim: identify the mechanism, address the time course, and account for other causes. A bare "glaucoma is related to the diabetes" without rationale is not probative. A fully articulated opinion from an ophthalmologist or optometrist, grounded in the records, carries the case. The secondary conditions tool helps map which of your service-connected conditions could be driving an eye claim.

Common Evidence Gaps in Glaucoma Claims

A few patterns I see across BVA glaucoma decisions, tied to the outcome statistics below.

No perimetry in the file. This is the central gap and it lines up directly with the inadequate-exam rate. The C&P exam records acuity, notes the glaucoma is controlled, and never runs formal visual-field testing. The field-loss axis of the rating formula then has nothing to evaluate, and the rating defaults to acuity, which is exactly the axis glaucoma spares. With 47.0 percent of the assessed cases showing an inadequate exam, the missing or inadequate field test is doing real work in this dataset.

The medication minimum never gets argued. A veteran with well-controlled open-angle glaucoma on daily drops gets a noncompensable rating because the field and acuity looked normal, and nobody invoked the DC 6012 10 percent floor. The prescription record was in reach the whole time; it just was not connected to the regulation.

Acuity measured without correction, or the correction not documented. The rating runs on best-corrected acuity. If the exam records uncorrected vision, or does not specify, the acuity figure can be wrong in either direction and the rater is working from a number that does not match the regulation.

Secondary theory undeveloped. A diabetic veteran's glaucoma, or a veteran's steroid-induced glaucoma, gets filed as a direct claim with no service-connected onset, instead of as a secondary to the underlying service-connected disease. Without the nexus opinion tying it to the diabetes, the steroid regimen, or the old eye trauma, the service-connection question never gets reached and the visual-impairment rating is moot.

Stale field data. Glaucoma progresses. A field study from years ago does not reflect current loss. If the most recent perimetry in the file predates the current claim period, the rating may be built on outdated field measurements, understating a condition that has advanced.

I do not know the exact share of glaucoma claims that carry any one of these gaps; the dataset codes outcome and exam adequacy, not gap-by-gap frequency. What I can say from Claim Raven's analysis of 500 BVA glaucoma cases is that denials ran at 52.2 percent, remands at 28.8 percent, and grants at just 19.0 percent, and that of the 385 cases with a C&P adequacy determination, 47.0 percent had the exam flagged as inadequate. That denial-heavy, inadequate-exam-heavy pattern is consistent with the story this page tells: when the field test is missing and the medication floor is not argued, the disability the formula would capture never reaches the rating.

Bottom Line

Glaucoma is not rated on the diagnosis. It is rated on the visual impairment it produces, under the General Rating Formula in 38 CFR § 4.79, through DC 6012 for open-angle and DC 6013 for other forms. Because the disease takes the peripheral field first and spares central acuity until late, the field-loss measurement is usually the one that matters, and a C&P exam that skips perimetry understates the disability. For open-angle glaucoma, the 10 percent medication minimum is a floor most veterans never invoke, and the only evidence it takes is the prescription record. The cases that succeed at the Board tend to have formal visual-field testing, a documented medication requirement, and, where the glaucoma flows from diabetes, steroids, or trauma, a properly developed secondary nexus. Same disease, different paper trail, different outcome.

Related Conditions

Glaucoma sits inside the larger picture of service-connected eye disease, so it commonly connects to cataracts, diabetic retinopathy, and dry eye, all of which are also rated through the eye-impairment framework in § 4.79 and § 4.77. When the glaucoma is secondary, the underlying driver is often diabetes, and the diabetic eye complications are best worked as a set. Veterans with more than one service-connected condition that could be driving an eye claim should review the secondary conditions tool before assuming a single direct claim tells the whole story.

Methodology and Limitations

• Data source: Rating criteria from 38 CFR § 4.79, DC 6012 (open-angle glaucoma) and DC 6013 (other / juvenile glaucoma), evaluated through the General Rating Formula for Diseases of the Eye. Visual-field conversion from 38 CFR § 4.77. Visual-acuity rating from § 4.79. Secondary service connection from § 3.310, with aggravation under Allen v. Brown. The 10 percent open-angle medication minimum is stated in the DC 6012 criteria.
• Sample size: Patterns in this post are drawn from Claim Raven's analysis of 101,518 condition records drawn from the analyzed subset of Claim Raven's 501,000+ Board-decision library, including 500 glaucoma cases. Within that glaucoma subset, outcomes ran 19.0% granted, 28.8% remanded, and 52.2% denied. Of the 385 cases with a C&P adequacy determination, 47.0% had the exam flagged as inadequate. The dataset captures overall outcome and exam-adequacy rather than a per-axis (acuity versus field) breakdown of how each case was rated.
• Classification approach: Diagnostic code definitions and the visual-impairment framework drawn from the regulatory text. Secondary-chain analysis follows § 3.310 and established aggravation case law. The medication-minimum analysis follows the DC 6012 regulatory language.
• Limitations:
• Glaucoma ratings turn on measured values (best-corrected acuity and perimetry results) that are specific to each case. This page describes the rating structure qualitatively and cites the governing CFR sections rather than asserting tier percentages tied to specific measurements.
• Compensation values adjust annually with COLA.
• The DC 6012 medication minimum applies to open-angle glaucoma; do not assume it transfers automatically to DC 6013 forms.
• Selection bias: BVA-level patterns reflect cases that appealed. Most glaucoma claims resolve at the RO level and are not in any BVA dataset.
• Application of the visual-field rating framework at the RO level is uneven, and missing perimetry is a recurring source of inadequate exams.
• These observations reflect patterns from the regulatory text, case law, and BVA decisions. They are not predictions of individual outcomes.