Standard Patient Evaluation of Eye Dryness (SPEED): A Full Guide for Researchers and Clinicians
By ResRef
Published
Learn about the Standard Patient Evaluation of Eye Dryness: what it measures, how it is scored and interpreted, and how researchers and clinicians use it.
Introduction
The Standard Patient Evaluation of Eye Dryness (SPEED) questionnaire is a vital, patient-reported instrument designed to quantify the symptoms of dry eye disease. First introduced in 2013 by William Ngo, Ping Situ, Nancy Keir, Donald Korb, Caroline Blackie, and Trefford Simpson, the SPEED provides a validated method for assessing symptom frequency and severity (Ngo et al., 2013). Consequently, its primary validation study has garnered over 350 citations, highlighting its significant impact and widespread adoption in ophthalmic research and clinical practice.
This article serves as an expert guide, meticulously detailing the SPEED questionnaire’s key features, clinical applications, and research value. Ultimately, it provides clinicians and researchers with the necessary insights for effectively incorporating this instrument into their work.
Key Features of the Standard Patient Evaluation of Eye Dryness (SPEED) Questionnaire
Purpose and Use
The core purpose of the SPEED questionnaire is to quantify patient-reported symptoms of dry eye by assessing symptom frequency and severity across defined time frames. It aims to provide a repeatable and valid measure of dry eye symptoms and to evaluate its performance in distinguishing symptomatic from asymptomatic individuals.
Target Population
The SPEED is validated for adults aged 18 years and older. Its target population includes:
Young Adults (18–24 years)Middle-Aged Adults (25–44 years)Older Adults (45–64 years)Seniors (65+ years)Furthermore, it is validated for use in both symptomatic and asymptomatic dry eye populations, including contact lens wearers.
Structure
The SPEED questionnaire is structured to provide a comprehensive yet efficient assessment of dry eye disease. Its core instrument comprises 8-items that form the standard SPEED score. These items systematically evaluate patient-reported symptoms across two primary domains and multiple time frames to capture the dynamic nature of the condition.
The questionnaire assesses the following core ocular symptoms:
DrynessGrittiness or scratchinessSoreness or irritationBurning or wateringEye fatigueFor each of these symptoms, the structure provides a dual assessment across two key subdomains:
Symptom Frequency: Rated on a scale from 0 to 3Symptom Severity: Rated on a scale from 0 to 4Critically, this assessment covers three distinct time frames to evaluate symptom timing and persistence:
Current symptomsSymptoms over the past 72 hoursSymptoms over the past 3 monthsAn extended version, known as the "SPEED score Full" is also defined in the original validation study. This version combines the 8 core items with an additional 12 binary (yes/no) questions, resulting in a 20-item instrument used for broader analysis of demographic and risk factors.
Scoring Method
The standard SPEED score is calculated by summing the responses from the frequency (0–3) and severity (0–4) ratings of the 8 core symptom items, yielding a total range of 0 to 28. For the SPEED score Full, responses from the 12 binary items are added, creating a score range of 0 to 40.
It is important to note that the original development/validation study did not define diagnostic cut‑off values or severity categories for the SPEED score (Ngo et al., 2013). While independent studies have proposed sample‑specific thresholds, most commonly in the range of 4–6 points, these values are not part of the original validated scoring framework and vary by study and population.
Administration Format
The SPEED questionnaire is highly efficient, typically taking less than 5 minutes to complete. Healthcare teams can administer it via:
Paper-based formsDigital (Online)Interview (In-person)Phone/Video CallNo special training is required as it is a self-administered questionnaire.
Applications of the Standard Patient Evaluation of Eye Dryness (SPEED) Questionnaire
The SPEED questionnaire is a versatile tool with several key applications:
Screening: Identifying individuals with symptomatic dry eye.Monitoring: Tracking symptom progression or improvement over time, especially before and after interventions.Treatment Planning: Informing clinical decisions based on patient-reported symptom burden.Research: Serving as a primary or secondary patient-reported outcome measure in clinical trials and observational studies.Language and availability
Due to its global use, the SPEED questionnaire is available in several validated languages, including:
EnglishMandarin ChinesePortugueseItalianThaiThe SPEED is free for clinical and research use. However, permission from the publisher, TearScience, Inc., is recommended for commercial use, large-scale trials, or formal translations.
Other Versions And Related Questionnaires
Researchers and clinicians should be aware of other versions of the questionnaire:
SPEED Score Full (20-item): Defined in the original validation study alongside the standard 8-item score, this extended version combines the core symptom items with 12 binary (yes/no) It is used for additional analysis of demographic factors and risk profiles, providing a score range of 0–40.Additionally, the SPEED can be used alongside complementary assessment tools for dry eye disease, such as:
The Ocular Surface Disease Index (OSDI)The Dry Eye Questionnaire (DEQ)The McMonnies Dry Eye Questionnaire (MQ)The Subjective Evaluation of Symptom of Dryness (SESoD)Reliability and Validity
The psychometric soundness of the SPEED is well-documented. Studies confirm it is high reliability and validity, with a Cronbach’s alpha ranging from 0.82 to 0.92, indicating excellent internal consistency.
The original validation study linkValidation of the European Portuguese version linkAdaption and validation of SPEED in European Portuguese in non-clinical sample linkComparison of SPEED and OSDI questionnaires for dry eye symptom in Chinese college students linkValidation of the Thai version linkValidation of the Italian version linkLimitations and Considerations
Despite its strengths, the SPEED questionnaire has a few limitations:
Self-report measure: Responses can be influenced by a patient’s subjective perception and recall.Narrow Focus: It is designed specifically for dry eye symptoms and does not assess broader quality of life or ocular surface signs.Additional Resources
The Original Validation Study linkDry Eye Syndrome Questionnaires linkPsychometric Analysis of the SPEED Questionnaire and CLDEQ-8 linkNo official public access link available: The questionnaire is distributed via proprietary clinical forms (TearScience)For inquiries, contact William Ngo: School of Optometry and Vision Science, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1 (e-mail: wngo@uwaterloo.ca).Frequently Asked Questions (FAQ)
1. Who can use the SPEED questionnaire?
Clinicians, researchers, and optometrists use the SPEED for adults aged 18 and older, particularly those with or at risk for dry eye disease, including contact lens wearers.
2. How long does it take to complete the SPEED?
Patients typically complete the core 8-item SPEED questionnaire in less than 5 minutes, making it highly efficient.
3. How is the SPEED administered?
The questionnaire is versatile and can be administered via paper, digital forms, online surveys, or during a clinical interview.
4. Is there any cost to using the SPEED?
The SPEED is free to use. However, for large-scale commercial projects or clinical trials, seeking permission from the publisher (TearScience, Inc.) is advised.
A Word from ResRef
The SPEED questionnaire is a validated, efficient, and sensitive patient-reported measure for assessing dry eye symptoms. It demonstrates high repeatability and discriminative validity, making it an excellent tool for both screening and monitoring in clinical practice and research. However, it is not a diagnostic tool. Interpretation should always be combined with objective ocular surface testing for comprehensive clinical decision-making.
References
Ngo, W., Situ, P., Keir, N., Korb, D., Blackie, C., & Simpson, T. (2013). Psychometric properties and validation of the Standard Patient Evaluation of Eye Dryness questionnaire. Cornea, 32(9), 1204–1210. linkRamalho, E., Soares, I., Brardo, F. M., & Nunes, A. F. (2025). Clinical validation of the Standardized Patient Evaluation of Eye Dryness Questionnaire in European Portuguese in a non-clinical sample. International ophthalmology, 45(1), 64. linkSanches, A. L., Leite, S. G., Nunes, A., Caixinha, M., Monteiro, P., & Nunes, A. (2023). Adaptação do Questionário Standardized Patient Evaluation of Eye Dryness para Português (SPEED-Vp) numa População Não Clínica [Adaptation of the Standardized Patient Evaluation of Eye Dryness Questionnaire to European Portuguese (SPEED-Vp) in a Non-Clinical Sample]. Acta medica portuguesa, 36(11), 714–722. linkMeng, X., Geng, R., Yang, K., Wei, J., Xu, Z., Wang, M., & Ren, S. (2025). Comparison of SPEED and OSDI questionnaires for dry eye symptom in Chinese college students: a cross-sectional study. BMC ophthalmology, 25(1), 425. linkLekhanont K, Ariyanonthacha P, Wongrathanandha C, Phimpho P, Cheewaruangroj N (2024) Validity and reliability of the Thai version of the ASCRS SPEED II preoperative OSD questionnaire in Thai cataract surgery candidates. PLoS ONE 19(4): e0301067. linkFacchin, A, and Boccardo, L. Italian translation, validation, and repeatability of standard patient evaluation of eye dryness (SPEED) questionnaire. Cont Lens Anterior Eye. (2022) 45:101497. linkMeng, X., Geng, R., Yang, K. et al. Comparison of SPEED and OSDI questionnaires for dry eye symptom in Chinese college students: a cross-sectional study. BMC Ophthalmol 25, 425 (2025). linkAndrew D. Pucker, Bradley E. Dougherty, Lisa A. Jones-Jordan, Justin T. Kwan, Carolina M. E. Kunnen, Sruthi Srinivasan; Psychometric Analysis of the SPEED Questionnaire and CLDEQ-8. Invest. Ophthalmol. Vis. Sci. 2018;59(8):3307-3313. link