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Developmental Eye Movement™ Test (DEM™)


Item #: DEM+

Professional Pricing Available to Healthcare Professionals, Schools, & Government. Click on the blue info button for more details.

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  • Developmental Eye Movement Test™ (DEM™) (Includes Scoring Software)
  • Product not available to general public. Healthcare Professionals, Schools, & Government, please login for pricing. Click on the blue info button for more details

  • DEM™ Examiner's Manual
  • Product not available to general public. Healthcare Professionals, Schools, & Government, please login for pricing. Click on the blue info button for more details

  • DEM™ Scoring Software (Windows Only)
  • Product not available to general public. Healthcare Professionals, Schools, & Government, please login for pricing. Click on the blue info button for more details

  • DEM&trade; Replacement Test Plates <i>(Instructions & Test Standards Not Included)</i>
  • Product not available to general public. Healthcare Professionals, Schools, & Government, please login for pricing. Click on the blue info button for more details

  • DEM&trade; Score Sheets (Pad of 25)
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Bernell's exclusive Developmental Eye Movement (DEM™) test offers an objective method for assessing fixational and saccadic activity during both reading and non-reading tasks. Developed by Dr. Jack Richman, OD and Dr. Ralph Garzia, OD, the test includes a sub-test that assesses oculomotor function with numbers in a horizontal array. This feature allows for an in-depth evaluation of the patient's visual abilities. The test includes a manual, test plates, scoring software, a pad of evaluation sheets, and an expanding carrying case.

The Developmental Eye Movement (DEM) test comes with a comprehensive manual (2nd Edition) that includes detailed instructions, more than 60 pages of tables with standards based on age and grade level, case histories, and clinical treatment considerations. Additionally, the package includes scoring software that allows for efficient and accurate comparison to standardized scores, as well as saving time and reducing errors. It is important to note that the software is only compatible with Windows and is not supported on Mac systems.

Click here to download DEM Scoresheet Instructions. A pad of 25 evaluation sheets also comes with the test. Additional scoring sheets may be purchased.

Features of the Developmental Eye Movement Test™ (DEM™):
→ Provides an objective method of assessing fixational and saccadic activity during reading and non-reading tasks.
→ Incorporates a sub-test of number calling in a vertical array, allowing for evaluation of oculomotor function with numbers in a horizontal array.
→ Developed by Dr. Jack Richman, OD and Dr. Ralph Garzia, OD.
→ Includes a manual with instructions and tables of standards based on age and grade level, as well as case histories and clinical treatment considerations.
→ Scoring software saves time and prevents errors, and displays comparisons to standardized scores.
→ Comes with a pad of evaluation sheets and an expanding carrying case for easy transport and storage.

Several studies have been conducted on the DEM test, including research on its use in comparison to other tests such as the King Devick Test, its impact on visual-verbal skills, its use in neuro-optometric rehabilitation, and its relationship to reading and visual processing skills in children. The studies have been published in various journals such as Journal of Optometry, Optometry Vision Science, Public Library of Science and JAMA Ophthalmology.

Studies Supporting the DEM™:

King Devick Test VS. Developmental Eye Movement Test , by Basiliki Evelyn Tomaras and Sarah Trommater Senior Class Project 2004

Garzia RP, Richman JE, Nicholson SB, Gaines CS. "A new visualverbal saccade test: the development eye movement test (DEM)."
Journal of Optometry Association. 1990 Feb; 61(2): 124-135


Garzia RP, Richman JE, Walker AJ. "The impact of automatic digit naming ability on a clinical test of eye movement functioning." Journal of Optometry Association. 19983 Jul;54(7): 617-22.

Kapoor N, Ciuffreda KJ. "Assessment of neuro-optometric rehabilitation using the Developmental Eye Movement (DEM) test in adults with acquired brain injury." Journal of Optometry. 2017 Jul; S188-4296(17)30040-7.

Kulp MT, Schmidt PP. "The relation of clinical saccadic eye movement testing to reading in kindergartners and first graders." Optometry Vision Science. 1997 Jan;74(1):37-42.

Kulp MT, Schmidt PP. "Relationship between visual skills and performance on saccadic eye movement testing." Optometry Vision Science. 1998 Apr; 7 5 ( 4): 284-7.

Xie Y, Shi C, Tong M, Zhang M, Li T, Xu Y, Guo X, Hong Q, Chi X. "Developmental Eye Movement (DEM) Test Norms for Mandarin Chinese-Speaking Chinese Children." Public Library of Science. 2016 Feb; 26881754.


"Frequency of Visual Deficits in Children With Developmental Dyslexia." JAMA Ophthalmology

"Vision and Academic Performance in Primary School Children." School of Optometry and Vision Science and Institute of Health and Biomedical Innovation

Update: we were made aware of a printing error that occurred during the printing of the Version 2.5 manuals. The printing error occurred on the first page of Table 4 "Vertical Time AGE 9.0 - 9.11". This was correct in previous versions of the manual and has since been corrected in Version 2.7 and after. However, if you purchased a Version 2.5 manual then you may download this pdf with the updated pages.Click here to download

DEM Calculator App     Click here to watch the DEM Calculator App in action.

New Mobile Scoring Software available through Google Play or iTunes App Store.
If you are interested in having a DEM scoring software available on your phone or tablet, Bernell has partnered with MakeMind, a developer in Australia, to release a new scoring app for the DEM known as the DEM Calculator. This app is available for purchase through iTunes App Store or the Goggle Play Store. Please click on the buttons below to learn more about the app.

iTunes       Goggle Play Store

It is important to note that the DEM Scoring Software is non-returnable and only compatible with Windows operating systems, not Mac computers. Before purchasing the software, it is essential to ensure that the proper hardware is available to use it.

Call Toll Free 1-800-348-2225 or (574) 259-2070

Fax to (574) 259-2102 or (574) 259-2103