Ophthalmology Expert Witness’ Testimony Not Fully Excluded Because He Understands Color Vision Acuity Testing
Posted on December 23, 2024 by Expert Witness Profiler
Plaintiff Mark Walker (“Walker”) worked as a locomotive engineer for Defendant Union Pacific Railroad Company (“Union Pacific”) from approximately 2005 through 2019. After the Court dismissed Walker’s claim under the Americans with Disabilities Act (“ADA”) alleging failure to accommodate, Walker’s remaining claims allege disparate treatment and disparate impact in violation of the ADA. Walker contends that Union Pacific “regarded” Walker as disabled by having a color vision deficiency.
Plaintiff alleged that Union Pacific violated the ADA by requiring Walker to take a secondary color vision field test (“CVFT”), Union Pacific’s proprietary “Light Cannon” test, even though Walker had just passed a scientific color vision test, the “Ishihara” test. Walker also alleged that Union Pacific violated the ADA because the specific version of Union Pacific’s proprietary Light Cannon test that was administered to Walker in July 2019 did not effectively assess an employee’s ability to read and interpret railroad signals because that test screens out qualified individuals who do not, in fact, have color vision deficiencies but whom the test, and thus Union Pacific, wrongfully “regards” as being color vision deficient.
Walker was hired by Union Pacific in 2003, and he passed the Ishihara at that time. He was certified as an engineer in 2005 and he again passed the Ishihara. In 2007 he passed the Ishihara again as part of his recertification as an engineer. In 2010, Walker failed the Ishihara test after incorrectly identifying two plates. Walker was recertified as an engineer, however, after he passed Union Pacific’s then-current wayside signal CVFT. In 2013, Walker again failed the Ishihara by incorrectly identifying two plates. Again, Walker was recertified after passing Union Pacific’s wayside signal CVFT. Walker passed the Ishihara on June 20, 2016. He again passed the Ishihara on June 21, 2019.
Challenges to Expert Testimony
Walker moved to exclude or limit the testimony of Union Pacific’s expert witnesses Steven Fender and Jeff Rabin, O.D., Ph.D. He argued that Fender is not qualified to provide expert testimony on any subject relevant to this case and that Fender’s testimony is irrelevant and unreliable. Walker contended that because he passed the Ishihara test, is a qualified employee as a matter of law, and the Light Cannon is only a qualification standard, Fender’s testimony about regulatory standards is irrelevant. He also argued that Fender is unqualified to render any opinion outside of regulatory standards, such as the efficacy of the Light Cannon test, and his opinions about the efficacy of the Light Cannon test are unreliable and unhelpful to the jury.
Walker also moved to limit Rabin’s testimony to what is contained in his non-reporting witness disclosure under Rule 26(a)(2)(C) of the Federal Rules of Civil Procedure.
Union Pacific moved to exclude the testimony of Walker’s expert witness Jay Neitz, Ph.D. as misleading, confusing, unreliable, and unhelpful to the jury. Union Pacific argued that Neitz’s testimony is misleading because he misinterprets federal regulations by construing the Light Cannon test as a “scientific” test instead of a “field” test.
Railroad Expert Witness
Steven Fender is a Railroad Transportation and Safety Consultant who has worked in the industry for 45 years. He worked for 31 years at the FRA. He is highly qualified in the fields of railroad operations, safety, and regulations.
Optometry Expert Witness
Jeff C. Rabin is a tenured Professor of Optometry and Assistant Dean for Research, Assessment and Graduate Studies at the University of the Incarnate Word Rosenberg School of Optometry, where he teaches courses in vision science, optics and binocular vision. Rabin received his Bachelor of Science in Physiological Psychology with highest honors from the University of California at Santa Barbara, and Doctor of Optometry, Masters of Science and Doctor of Philosophy Degrees in Physiological Optics from the University of California at Berkeley.
Ophthalmology Expert Witness
Jay Neitz is the E.K. Bishop Endowed professor in Ophthalmology at the University of Washington in Seattle. He has been a research scientist and an educator for 30+ years. He is an expert in all aspects of disorders of the eye and their effect on visual performance.
Discussion by the Court
Under the regulations of the Federal Railroad Administration (“FRA”), railroad companies must test railroad engineers at least every three years for, among other things, color vision acuity. The initial test must be one of a set of scientific tests approved by the FRA, including, as relevant here, the Ishihara 14-plate test (“Ishihara”). If an engineer fails the initial, or primary, test, the examinee may undergo a secondary test, which may consist of an [“o]phthalmologic referral, field testing, or other practical color testing.”
A. Development of Union Pacific’s Light Cannon Test
Union Pacific began developing the Light Cannon test in 2015. In October 2015, Dr. Jeff Rabin and Dr. Douglas J. Ivan, M.D., reviewed the Light Cannon test and testing protocol. The 2015 device contained four eight-inch LED lights, in two rows of two, that flashed four colors—red, yellow, green, and white—for five seconds each, and required each color light to be manually turned on and off. The examinee was located one-quarter mile away from the device, with a nurse taking down responses and Union Pacific staff at either end managing the test.
Rabin and Ivan issued their “draft” final report on January 25, 2016. This report identified that the Light Cannon test had “a number of critical short comings in its current design and within the proposed test administrative procedures.”
Union Pacific nevertheless implemented the Light Cannon test on April 1, 2016, with only the few modifications previously described and no further validation studies having been performed. Rabin was hired in approximately mid-2018 to conduct further studies to evaluate the efficacy of the Light Cannon. Rabin testified at deposition, and confirmed at the hearing, that based on the new testing protocols and other changes made to the Light Cannon test after his 2016 report, he believes the 2020 version of Light Cannon test is a valid field test. He noted, however, that for people with color deficiencies, he believes the change in testing protocols did not make a statistically significant difference.
B. Plaintiff Walker
On July 3, 2019, Union Pacific’s Associate Medical Director, Dr. Donald Richard Lewis, stated that Walker had met the FRA’s vision requirements and was approved for recertification. Nonetheless, two days later, Walker’s file was flagged as “not approved” for safety sensitive work. Dr. John
Holland, M.D., Union Pacific’s former Chief Medical Office had intervened to require Walker to undergo secondary testing with Union Pacific’s Light Cannon test, based on Walker’s previous Ishihara failures in 2010 and 2013. On July 8, 2019, Walker took and failed Union Pacific’s Light Cannon test. Based on this failure, Union Pacific determined that Walker could not work in a position requiring accurate color signal recognition, and thus he could not work in his current position.
In April 2016, after Union Pacific implemented the Light Cannon test, Walker was an employee who had “failed the primary color vision field testing on [his] last medical certification exam” (his 2013 Ishihara test), but Union Pacific did not retest him using the Light Cannon test despite the recommendation of the NTSB. Indeed, when Walker passed the Ishihara in June 2016, Union Pacific still did not make Walker take the Light Cannon secondary field test. Not until Walker failed the Ishihara in June 2019 did Union Pacific require him to take the Light Cannon secondary CVFT.
i. Walker’s Motion Challenging Fender
Fender’s opinion that the Light Cannon test is in compliance with the rules and regulations of the FRA is irrelevant
Walker argued that Fender’s opinion that the Light Cannon test “complied” with the FRA regulations is irrelevant. He also contended that with this opinion out as irrelevant, Fender is not qualified to opine about his remaining opinions, particularly about the “efficacy” of the Light Cannon test. Walker also asserted that Fender’s opinions other than those related to the FRA regulatory framework (which are irrelevant) are unreliable and not helpful to a jury.
Walker contended that Fender’s opinion that the Light Cannon test is in compliance with the rules and regulations of the FRA is irrelevant to this case because the Court ruled at summary judgment that Union Pacific did not have to subject Walker to the Light Cannon test under FRA regulations, and may even have been precluded from doing so under the regulations.
The Court can instruct the jury as to the legal requirements of the FRA, to the extent they are relevant. Further, whether the Light Cannon is “compliant” with the FRA, to the extent that may be relevant, is a legal conclusion and not a proper topic for expert testimony. Therefore, to the extent Fender’s testimony is intended to explain FRA rules and regulations regarding color vision acuity testing to the jury or opine that the Light Cannon was compliant with FRA rules and regulations, such testimony is improper.
The Court held that Fender may not opine about how Walker’s case compares to cases presented to the Locomotive Engineer Review Board or the Operating Crew Review Board, or that the Light Cannon test is in compliance with FRA rules and regulations per the decisions of those review boards. Such a discussion is of minimal relevance and is unduly prejudicial and potentially confusing to the jury.
Fender is qualified to opine as to whether the Light Cannon test was “valid” as that term is used in the Best Practices
Walker argued that Fender is unqualified to render an opinion regarding the efficacy of the Light Cannon test, and that the opinion is unreliable and unhelpful. Fender spent decades working in railroad operations and safety. He explained at the hearing that he had frequent exposure to railroad signals. He also saw the Light Cannon test in operation. The Court held that Fender is qualified to opine as to whether the Light Cannon test was “valid” as that term is used in the Best Practices—meaning that the test reasonably matched real world operating or working conditions.
Fender opined generally in his report that the Light Cannon test is “employee friendly” because it shows all four lights to orient the examinee and is “a practical, well-developed, and implemented test which replicates real world conditions.” During Walker’s 2019 test, he was not given the 2016 protocol (or the 2019 protocol as it is identified in Rabin’s testing); nor was he given the modified 2020 protocol. Nonetheless, the experts’ opinions about the efficacy of the Light Cannon test after the 2020 changes were implemented provide some probative value to the test taken by Walker, which involved a hybrid protocol between the 2016 and 2020 testing protocols.
The Court found that Fender’s opinion about the efficacy of the 2020 Light Cannon test, even though he repeatedly emphasized the importance of all four colors first being shown to the examinee, is somewhat helpful to the jury. It also is reliable because Fender has decades of related experience in the industry and personal experience viewing the Light Cannon test.
The remaining aspects of Fender’s opinion also are reliable and potentially helpful to the jury based on Fender’s experience and the issues in this case regarding railroad safety and the need for color vision acuity
The Court held that Fender may testify to Union Pacific’s general rail business and rail infrastructure, its importance in the supply chain, and its importance to national security and the military. He also may testify generally to the complexity and business of the rail lines and Union Pacific’s rail lines, in particular. Fender further generally may describe safety concerns, signaling systems, and the importance of color vision acuity to signaling systems and safe rail operations.
Walker’s Motion Challenging Rabin
Rabin is a limited expert witness disclosed under Rule 26(a)(2)(C) of the Federal Rules of Civil Procedure. Accordingly, he did not provide (and was not required to provide) an expert report. As an initial matter, the Court holds that, as with Fender, Rabin may not testify that the Light Cannon test complies with or is valid under the FRA’s rules and regulations.
Walker sought to ensure that Union Pacific does not attempt to have Rabin testify regarding anything specific to Walker—his color vision acuity, the application of the Light Cannon test with respect to Walker, or his ability to perform his job safely. The Court agreed that these issues are outside the scope of Rabin’s disclosed testimony.
The Court concluded, however, that Union Pacific has sufficiently disclosed its intention to elicit testimony from Rabin regarding his 2019-20 study of the Light Cannon test.
Counsel for Union Pacific also argued that there should be no temporal distinction between Rabin’s testimony regarding the 2016 and 2020 Light Cannon tests because Rabin noted that both versions of the test nearly equally captured persons with color vision deficiencies. This case, however, is about an employee who alleges that he does not have any color vision deficiency but instead was regarded as having such a deficiency because of his earlier failures of the Ishihara test.
Although Rabin’s opinion regarding the effectiveness of the Light Cannon is based on the modified 2020 test and testing protocols, like Fender’s opinion it still has some probative value and is thus somewhat helpful to the jury. This is because Walker did not receive the 2016 testing protocol. Thus, the Court held that Rabin may testify as to the efficacy of the 2020 Light Cannon and whether it accurately mimics actual operating or working conditions in the field.
Union Pacific’s Motion Challenging Neitz
Neitz mistakenly opined that the Light Cannon test must be validated as a scientific test instead of a field test
Union Pacific first argued that Neitz mistakenly opined that the Light Cannon test must be validated as a scientific test instead of a field test. They designed the Light Cannon as a field test, not a scientific test. It is intended to match newer LED signals. Regardless of the dispute about the validity of the Light Cannon test, the Court agreed that it is a field test and not a scientific test. Walker argued, however, that because the Light Cannon does not use any actual equipment from the field, it cannot be a field test.
That, however, goes to the “validity” of the field test, not to whether it is a field test. The Court will preclude, as irrelevant and misleading, Neitz from testifying that the Light Cannon test was required to undergo rigorous scientific study or peer review or must meet the standards of a scientific test to be a valid secondary field test.
Union Pacific also challenged the helpfulness of Neitz’s opinion because he does not provide a test that would suffice under the regulations. Neitz, however, discussed the advantages and disadvantages of several available tests. The Court held that this challenge goes to the weight of his opinion, not its admissibility.
Neitz’s opinion is unreliable because it relies on Rabin’s 2019-20 testing regarding the Light Cannon test
Finally, Union Pacific argued that Neitz’s opinion is unreliable because it relied on Rabin’s 2019-20 testing regarding the Light Cannon test without considering Rabin’s later deposition testimony regarding the validity of the Light Cannon test after the 2020 changes had been implemented and because Neitz has never seen the Light Cannon test.
The Court held that Neitz may focus on the pre-2020 test, which is more similar to the test given to Walker than the 2020 test, and Union Pacific can challenge through cross examination why Neitz did not further consider Rabin’s evaluation of the Light Cannon post-changes, and whether Neitz is moved by Rabin’s change of heart after the 2020 changes to the Light Cannon were implemented.
The Court held that Neitz is highly qualified regarding color vision acuity examinations, has reviewed Walker’s examinations and medical records, has reviewed the 2019-20 test data about the Light Cannon, understands color vision acuity testing in general, and offers a variety of opinions that are helpful to the jury on these topics. His opinions specific to the Light Cannon test do not necessarily require that he have seen the device, because he differentiates the pre- and post- 2020 protocols and relies on the underlying data from Rabin’s testing.
In other words, Neitz is not improperly “parroting” the opinion of another expert, but has independently reached his own opinions, relying on the facts and data gathered by another testifying expert.
Most of Neitz’s unchallenged testimony is unrelated to whether the Light Cannon test must undergo vigorous scientific testing
Finally, Union Pacific does not specifically challenge most of Neitz’s proposed testimony, other than generally to assert that because it is “based on” his misunderstanding that the Light Cannon test is not a field test, it must be excluded. The Court disagrees. Most of this unchallenged testimony is unrelated to whether the Light Cannon test must undergo vigorous scientific testing.
This includes:
(a) color vision acuity in general
(b) persons may not pass the primary color vision FRA test but still may safely work as a locomotive engineer or conductor because they have sufficiently color vision acuity to safely perform their duties
(c) how the majority of anomalous trichromats who fail the Ishihara can recognize and distinguish between railroad signals and the need for a valid test to separate out those who cannot
(d) Rabin’s 2019-20 study demonstrated that the Light Cannon test cannot screen anomalous trichromats who are perfectly capable of reading colored signals from those who cannot
(e) Rabin’s 2019-20 study showed that the Light Cannon was not a test that was reliable or valid (e.g., reasonably matched actual operating or working conditions), and reinforced he and Ivan’s 2016 report reaching the same conclusion
(f) a discussion of Walker’s past test results, including improper grading
(g) a discussion of Walker’s medical history and how it related to his color vision acuity
(h) a description of how Walker had consistently passed the color vision tests sufficient to show adequate color acuity.
The Court finds that all of this testimony is reliable and would be helpful to the jury.
Held
The Court granted in part and denied in part Plaintiff’s motion to exclude the testimony of Steven Fender and Jeff Rabin, and Defendant’s Daubert motion to exclude the testimony of Jay Neitz.
Key Takeaway:
- Fender’s opinion about the efficacy of the 2020 Light Cannon test, even though he repeatedly emphasized the importance of all four colors first being shown to the examinee, is somewhat helpful to the jury. It also is reliable because Fender has decades of related experience in the industry and personal experience viewing the Light Cannon test.
- Although Rabin’s opinion regarding the effectiveness of the Light Cannon is based on the modified 2020 test and testing protocols, like Fender’s opinion it still has some probative value and is thus somewhat helpful to the jury. This is because Walker did not receive the 2016 testing protocol. Thus, the Court held that Rabin may testify as to the efficacy of the 2020 Light Cannon and whether it accurately mimics actual operating or working conditions in the field.
- Neitz is not improperly “parroting” the opinion of another expert, but has reviewed Walker’s examinations and medical records, has reviewed the 2019-20 test data about the Light Cannon, understands color vision acuity testing in general, and offers a variety of opinions that are helpful to the jury on these topics.
Case Details:
| Case Caption: | Walker V. Union Pacific Railroad Company |
| Docket Number: | 3:22cv1011 |
| Court: | United States District Court, Oregon |
| Order Date: | December 19, 2024 |
