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Simplified ERG and VEP testing for all ages

RETeval Handheld ERG in Pediatric Ophthalmology

The RETeval® offers a portable, handheld solution that is comfortable for patients, easy for clinicians, and provides an efficient, objective functional assessment of retinal health.

Why choose RETeval for your pediatric patients?

We understand the need for comfortable, efficient testing in a pediatric setting. The handheld RETeval device, together with patented adhesive Sensor Strip skin electrodes, offers an optimized, easy-to-use solution for ERG and VEP testing with flexibility and comfort for patients and clinicians alike.

Clinical Benefits
  • Lightweight, handheld device is easy to use
  • Sensor Strip electrodes eliminate the need for corneal contact
  • Minimal sedation required for pediatric patients [49]
  • Fully ISCEV-compliant
  • No special room required for photopic testing
  • Handheld device can be brought to the patient for testing; no special position required
  • Can assess retinal function through closed eyelids in infants [56]

Sensor Strips

Adhesive Sensor Strip skin electrodes are available in two sizes for a comfortable fit. These flexible adhesive electrodes move with the patient and are simple to place, allowing consistent, sensitive functional assessment of retinal health.

Sensor Strips are available for purchase in our online store.
Learn more

CASE STUDY

ERG Supports Diagnostic Accuracy in a Pediatric Patient

Discover how the RETeval ERG/VEP device, plays a crucial role in understanding the cause of highmyopia in a pediatric patient – all 
without sedation.

Read the case study

Backed by Science

Validated by Peer-Reviewed Research Studies

Being a doctor, you know how difficult it can be to examine children with vision problems. Review the studies that demonstrate the positive impact on the pediatric patient’s experience and see how ERG/VEP testing with this portable device can enhance your diagnostic capabilities.

Minimal Sedation Required

Several RETeval studies found that the majority of patients are tested without sedation.
% of Pediatric Patients Requiring Sedation
Research Study RETeval Conventional ERG
Zhang (2022)[48] 12%[57] 56% of children under 8 years old [58]
Zhang (2021)[49] 7%
Grace (2017)[18] 8%
Osigian (2018)[50] 0%

High Diagnostic Accuracy

  • “In the pediatric group there is a high diagnostic agreement between both [Espion 300 desktop system (Diagnosys llc, Cambridge, UK) and RETeval] systems (Cohen’s Kappa k = 0.80). The relative sensitivity and specificity of the RETeval were 1.0 and 0.91 [to detect retinal dysfunction by light- and dark-adapted ERG].” [51]
  • “100% specificity and 93% sensitivity were achieved, with a cut-off of 2.54 µV [for detecting retinal dysfunction in patients with nystagmus with a 30-Hz flicker.]” [18]
  • “Scatterplots of the amplitudes and implicit times showing the correlations between the results obtained by the RETeval and conventional ERG system are shown in Figure 2. There was a significant positive correlation between two recording methods in the amplitudes (r=0.576, P,0.001, n=35; Pearson correlation coefficient)” [33]

Reliable, Repeatable Results

  • “The amplitude and timing of the RETeval 30-Hz flicker response were positively associated with the clinical ERG; (3) the RETeval 30-Hz flicker (…) had good intra-visit reliability;” [54]
  • “In the normal participants, the intraclass correlation coefficients for interocular amplitude and implicit time were 0.82 and 0.71, respectively, indicating good to excellent agreement between eyes.” [18]

Superior Quality & Test-retest Stability for Sensor Strips

The Sensor Strip Electrode quality was validated by 14 studies with more than 600 patients. Read a few citations from these studies:

  • “The intraclass correlation (ICC) was 90.2%. Thus, the RETeval device measurements have excellent reproducibility.” [3]
  • “The electrodes demonstrated similar intersession repeatability with a coefficient of repeatability of +/-27% and +/-28% for the DTL and sensor strip, respectively.” [52]
  • “Waveform morphologies were similar between electrode types. Regression coefficients (conversion factors) for a-wave and b-wave amplitudes under both photopic and scotopic conditions were tightly clustered.” [53]
  • “In the normal participants, the intraclass correlation coefficients for interocular amplitude and implicit time were 0.82 and 0.71, respectively, indicating good to excellent agreement between eyes”. [18]
“I use RETeval every day. It’s easy to use and I don’t need a technician to use it. I like it so much that I use it myself, so if I need ERG I’ll do it right away. (...) I’ve used all of those (tests) but my favorite really is the dark-adapted rod flash followed by light-adapted flicker. I can do that within four minutes.”
Rob Koenekoopp, MD, PhD
Pediatric ophthalmologist and specialist
in inherited retinal degenerations

Increasing Pediatric Patient Cooperation

ERG testing on children is difficult as you know. Using a device that is well tolerated and easy on the patient ensures that you get the clinical information you need. See what a few investigators experienced with traditional systems and their electrodes.

“The ophthalmoscopic appearance of his fundus suggested that this boy was also affected with retinitis pigmentosa, but he did not agree to have the ERG examination with the conventional system with contact lens electrodes. The flicker responses in the RETeval showed reduced amplitudes in both eyes (1.1 µV, right eye and 0.56 µV, left eye), which were lower than the mean −2.0 SD of the control eyes.”[33]

“One limitation of the present study is that younger children (4-6 years) were not included in the analysis. This was because most children within this age range could not tolerate the Espion E3 visual electrophysiology system and the DTL electrodes. Subsequently, ERG data for younger children were collected using a hand-held ERG system with skin electrodes (the RETeval visual electrophysiology system, LKC).”[55]

How to make testing easier

Advice from pediatric ophthalmologists that use RETeval in their daily practice

Involve parents, and let the child sit on their lap, they may hold it over the shoulder, whatever position is convenient for the child. Your RETeval can be used even upside down without compromising the quality of the test results.

As you test only one eye at a time, use the other eye to entertain the child: play a movie, use toys with bright colors and sound. Make a fun game out of ERG test time.

For small babies, use non-nutritive sucking and white noise – it really works!

“Having the RETeval results right at the front allows us to use our time more appropriately. We do all of our full-field ERGs using the RETeval device and I’d say it’s been a game-changer.”
Ian MacDonald, MD
Pediatric ophthalmologist

You’re not alone with the RETeval device

We do our best to support doctors as we know that not everyone is familiar with executing ERG tests and interpreting results. That’s why we developed the Customer Resource Center which offers a wide range of materials created with the help of users from all over the world.

ERG EDUCATION

New to electrophysiology? Watch our “SunERGy” video series that gets you from zero to hero in ERG.

RESULT INTERPRETATION

Need help understanding ERG results? Open the Clinical Interpretation Guide and the Case Book.

PATIENT EDUCATION

Do you want to tell parents about this new test provided by your clinic? Utilize the Practice Resource Kit we prepared for you.

All these materials, and many more, are available exclusively to LKC customers through the RETeval Academy. 

Visit RETeval ACADEMY

"Why I love the RETeval handheld ERG"

Dr. Wendy Harrison, OD, Ph.D., FAAO, a professor at the University of Houston and an expert in visual electrophysiology, electroretinography, and pediatric eye care, describes what she loves about the non-invasive and child-friendly nature of the RETeval device.

Let’s Talk!

Request a demo or a quote for the RETeval.

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© 2025 LKC Technologies, Inc.

California Proposition 65 information

Prop-65Warning: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Substance Tables:

The table below lists substances which may be contained within LKC’s RETeval and RETevet products. Substances listed as Type 1 are within permissible levels in one or more of LKC’s products. Substances listed as Type 2 are used in the production of some components used in LKC products and may be present at trace levels, but are typically destroyed during processing. 

RETeval and RETevet Devices

Substance CAS # Type Listed as causing:
Nickel 7440-02-0 1 Cancer
Acrylonitrile 107-13-1 2
Ethylbenzine 100-41-4 2
Crystaline Silica 14808-60-7 1
Lead 7439-92-1 1 Cancer Developmental Toxicity Male Reproductive Toxicity Female Reproductive Toxicity
Methylene Chloride 75-09-2 2 Cancer Female Reproductive Toxicity
Bisphenol A 80-05-7 2
N-Hexane  110-54-3 2 Male Reproductive Toxicity