Skip to content
SPEAK TO AN ATTORNEY TODAY (817) 810-0088
SPEAK TO AN
ATTORNEY TODAY
(817) 810-0088
Sloane Law Firm Logo
  • Our Team
    • David Sloane
    • Alexis Archer
    • Ian Perez-Routledge
    • Ariah Kragness
    • Elena York
    • Chaney Hartgrove
  • Criminal Defense
    • Assault & Battery
      • Assault – Bodily Injury
      • Assault – Public Servant
      • Aggravated Assault – Serious Bodily Injury
      • Aggravated Assault – Deadly Weapon
      • Injury to Child/Elderly/Disabled
      • Abandoning/Endangering a Child/Elderly/Disabled
      • Deadly Conduct
      • Terroristic Threat
    • Asset Forfeiture
    • Domestic Violence
      • Assault – Bodily Injury Family Violence
      • Assault Family Violence Previous Conviction
      • Assault Impeding Breath/Circulation
      • Continuous Violence Against the Family
      • Terrorist Threat Family Violence
    • Drug Crimes
      • Drug Penalty Group 1
      • Drug Penalty Group 2
      • Drug Penalty Group 3
      • Federal Drug Crimes
      • Possession
      • Marijuana
      • Drug Manufacturing
      • Trafficking
      • Sales
    • DWI
      • Field Sobriety Tests
      • Occupational Driver's License
      • Administrative Driver's License Revocation
      • Felony DWI
      • Multiple DWI
    • Federal Crimes
    • Felonies
    • Appeals
    • Misdemeanors
    • Probation
    • Expunctions
    • Nondisclosures
    • Sex Crimes
      • Child Pornography
      • Sexual Assault
      • Aggravated Sexual Assault
    • Theft Crimes
      • Burglary
    • Robbery
    • Weapons & Possession
    • White Collar Crimes
      • Fraud
    • Violent Crimes
  • Areas We Serve
    • Fort Worth & Tarrant County
    • Cleburne & Johnson County
    • Dallas & Dallas County
    • Decatur & Wise County
    • Denton & Denton County
    • Granbury & Hood County
    • McKinney & Collin County
    • Waxahachie & Ellis County
    • Weatherford & Parker County
    • More Areas
      • Brown County
      • Collingsworth County
      • Cooke County
      • Dallam County
      • Eastland County
      • Montague County
      • Moore County
      • Randall County
      • McLennan County
      • Foard County
      • Hardeman County
      • Wilbarger County
      • Armstrong County
      • Potter County
      • Hunt County
      • Culberson County
      • El Paso County
      • Hudspeth County
      • Carson County
      • Childress County
      • Deaf Smith
      • Donley County
  • Case Results
  • Testimonials
  • Blog
  • Contact Us

Standardized Field Sobriety Test Explained – Horizontal Gaze Nystagmus

Home  >  Blog  >  Standardized Field Sobriety Test Explained – Horizontal Gaze Nystagmus

October 13, 2023 | By Sloane Law Firm
Standardized Field Sobriety Test Explained – Horizontal Gaze Nystagmus

Experienced DWI Defense in Tarrant County and the Dallas – Fort Worth Area

Driving While Intoxicated (DWI) is one of the most common alcohol-related criminal offenses in Tarrant County, the Dallas – Fort Worth Area, and Texas. An alcohol-related conviction has potentially lifelong consequences, such as, jail or prison time, in-patient rehabilitation, and a stain on your criminal record. The experienced Tarrant County DWI Criminal Defense Lawyers with Sloane Law Firm can protect you!

What are the Standardized Field Sobriety Tests?

The Standardized Field Sobriety Tests (SFSTs) are used by law enforcement officers to determine if an individual is driving while intoxicated. The most commonly used Standardized Field Sobriety Tests used by police in Texas are (1) Horizontal Gaze Nystagmus Test, (2) Walk-and-Turn Test, and (3) One-Leg Stand Test.

Horizontal Gaze Nystagmus Test Explained

During the Horizontal Gaze Nystagmus Test (HGN), the police officer observers the eyes of a person as the individual’s gaze follows a moving object. The police officer is looking for horizontal nystagmus – the involuntary jerking of the eyeball. When administering the Horizontal Gaze Nystagmus Test, the police officer looks for a total of six clues, three clues in each eye:
  • Lack of smooth pursuit – The individual’s eye is not smoothly following the object.
  • Distinct nystagmus at maximum deviation – The individual’s eye begins to jerk from a far lateral gaze.
  • Onset of nystagmus prior to 45 degrees – The point when the individual’s eye starts to jerk (prior to 45 degrees indicates impairment).
If the police officer observes four or more total clues, the person fails the HGN test and is likely to be accused of being intoxicated.

Driving While Intoxicated Explained

In Texas, a person commits the offense of driving while intoxicated (DWI) if the person is intoxicated while operating a motor vehicle in a public place. To learn more about DWI and how our Tarrant County DWI Criminal Defense Lawyers can protect you, visit our Sloane Law Firm DWI Webpage.

Driving While Intoxicated Punishment

The following is a list of punishments for DWI convictions under the Texas Penal Code:

DWI 1st

Class B Misdemeanor

3 – 180 days in Jail & <$2,000 fine

DWI – Open Container

Class B Misdemeanor

6 – 180 Days in Jail & <$2,000 Fine

DWI 2nd

Class A Misdemeanor

30 Days – 1 Year in Jail & $2,000 - $4,000 Fine

DWI BAC >/= 0.15

Class A Misdemeanor

<1 Year in Jail & <$4,000 Fine

DWI – Child Passenger (<15y/o)

State Jail Felony

180 Days – 2 Years in State Jail Facility & <$10,000 Fine

Felony DWI (DWI 3rd)

3rd Degree Felony

2 years – 10 years in Prison & <$10,000 Fine

How to Fight - Contact Us for a Free Consultation with our Tarrant County DWI Criminal Defense Lawyers

If you or a loved one are facing a DWI accusation, you need aggressive criminal defense representation. A DWI conviction carries substantial jail time, permanently stains your criminal record, and results in numerous collateral consequences. The experienced Tarrant County DWI Criminal Defense Lawyers with Sloane Law Firm are here to protect you! Our Tarrant County DWI Criminal Defense Lawyers have helped thousands of clients fight DWI cases in Texas and throughout the greater Dallas – Fort Worth Area, such as:
  • Tarrant County
  • Dallas County
  • Parker County
  • Denton County
  • Wise County
  • Johnson County
  • Hood County
  • Ellis County
  • Collin County

Contact us today at (817) 349-7118 for a FREE Consultation with the Tarrant County DWI Criminal Defense Lawyers at Sloane Law Firm!

Schedule Your Consultation

This field is for validation purposes and should be left unchanged.
Name(Required)
Name(Required)
By submitting, you agree to receive text messages from Sloane Law Firm at the number provided, including those related to your inquiry, follow-ups, and review requests, via automated technology. Consent is not a condition of purchase. Msg & data rates may apply. Msg frequency may vary. Reply STOP to cancel or HELP for assistance. Acceptable Use Policy

Practice Areas

  • Fort Worth DWI Lawyer
  • Fort Worth Felony DWI Lawyer
  • Fort Worth Multiple DWI Lawyer

Sloane Law Firm Logo

A criminal defense attorney is a legal professional who plays a pivotal role in safeguarding the rights and interests of individuals accused of committing crimes.

933 W Weatherford Street Suite 203,
Fort Worth, TX 76102

 

Get a free consultation

(817) 810-0088


  • Our Team
  • Criminal Defense
  • Areas We Serve
  • Case Results
  • Testimonials
  • Blog
  • Contact Us
© 2026 Sloane Law Firm | Privacy Policy | Sitemap