Eagleview Eye Clinic

Tag visual field

THE BJERRUM TANGENT SCREEN

The Bjerrum tangent screen is a device used in ophthalmology to assess the visual field, particularly the central and paracentral areas. It’s a flat surface with a tangent curve marked on it, used to map out the field of vision.

How it’s used:

  1. Patient fixation: The patient fixates on a central point.
  2. Stimulus presentation: A stimulus (e.g., a small object or light) is moved along the tangent screen.
  3. Visual field mapping: The patient indicates when they see the stimulus, allowing the examiner to map out the visual field.

Purpose:

The Bjerrum tangent screen is used to:

  1. Detect visual field defects: Identify defects in the central and paracentral visual field.
  2. Monitor glaucoma: Track changes in the visual field associated with glaucoma.
  3. Assess optic nerve function: Evaluate the function of the optic nerve.

The Bjerrum tangent screen is a useful tool for assessing and monitoring visual field defects, particularly in glaucoma patients.

VISUAL FIELD ANALYSER

A Visual Field Analyzer is a medical device used to assess the sensitivity and coverage of a patient’s visual field. It maps out the field of vision, detecting any defects or abnormalities, particularly in peripheral vision.

Key Features:

  • Visual Field Testing: Measures the sensitivity of the retina in different locations.
  • Diagnostic Capabilities: Detects conditions like glaucoma, age-related macular degeneration, and other neurological disorders.
  • Variety of Tests: Offers different testing strategies, such as threshold and screening tests.

Types of Visual Field Analyzers:

  • Humphrey Field Analyzer 3 (HFA 3): Considered the gold standard, featuring Guided Progression Analysis and SITA Faster testing.
  • ObjectiveFIELD Analyzer: Uses multifocal pupillographic objective perimetry (mfPOP) for completely objective visual field assessment.
  • PalmScan VF2000: A wearable, portable analyzer with gaze tracking and customizable reports.
  • Easyfield VR: Utilizes virtual reality technology for visual field screenings and threshold exams.
  • Kowa AP-7000: Offers advanced diagnostic capabilities and high accuracy ¹ ² ³ ⁴.

Benefits:

  • Early Detection: Identifies visual field defects and conditions at an early stage.
  • Accurate Results: Provides reliable and reproducible results.
  • Patient Comfort: Some devices offer features like automated verbal instructions and gaze tracking for improved patient experience.

When selecting a Visual Field Analyzer, consider factors such as ⁵:

  • Measurement Accuracy: Look for devices with high accuracy and reliability.
  • Testing Strategies: Choose a device that offers a range of testing options.
  • Patient Comfort: Consider devices with features that improve patient experience.
  • Data Management: Ensure the device allows for easy data storage and analysis.
VISUAL FIELD ANALYSER

A Visual Field Analyzer is a medical device used to assess the sensitivity and coverage of a patient’s visual field. It maps out the field of vision, detecting any defects or abnormalities, particularly in peripheral vision.

Key Features:

  • Visual Field Testing: Measures the sensitivity of the retina in different locations.
  • Diagnostic Capabilities: Detects conditions like glaucoma, age-related macular degeneration, and other neurological disorders.
  • Variety of Tests: Offers different testing strategies, such as threshold and screening tests.

Types of Visual Field Analyzers:

  • Humphrey Field Analyzer 3 (HFA 3): Considered the gold standard, featuring Guided Progression Analysis and SITA Faster testing.
  • ObjectiveFIELD Analyzer: Uses multifocal pupillographic objective perimetry (mfPOP) for completely objective visual field assessment.
  • PalmScan VF2000: A wearable, portable analyzer with gaze tracking and customizable reports.
  • Easyfield VR: Utilizes virtual reality technology for visual field screenings and threshold exams.
  • Kowa AP-7000: Offers advanced diagnostic capabilities and high accuracy ¹ ² ³ ⁴.

Benefits:

  • Early Detection: Identifies visual field defects and conditions at an early stage.
  • Accurate Results: Provides reliable and reproducible results.
  • Patient Comfort: Some devices offer features like automated verbal instructions and gaze tracking for improved patient experience.

When selecting a Visual Field Analyzer, consider factors such as ⁵:

  • Measurement Accuracy: Look for devices with high accuracy and reliability.
  • Testing Strategies: Choose a device that offers a range of testing options.
  • Patient Comfort: Consider devices with features that improve patient experience.
  • Data Management: Ensure the device allows for easy data storage and analysis.
VISUAL FIELD ANALYSER

A Visual Field Analyzer is a medical device used to assess the sensitivity and coverage of a patient’s visual field. It maps out the field of vision, detecting any defects or abnormalities, particularly in peripheral vision.

Key Features:

  • Visual Field Testing: Measures the sensitivity of the retina in different locations.
  • Diagnostic Capabilities: Detects conditions like glaucoma, age-related macular degeneration, and other neurological disorders.
  • Variety of Tests: Offers different testing strategies, such as threshold and screening tests.

Types of Visual Field Analyzers:

  • Humphrey Field Analyzer 3 (HFA 3): Considered the gold standard, featuring Guided Progression Analysis and SITA Faster testing.
  • ObjectiveFIELD Analyzer: Uses multifocal pupillographic objective perimetry (mfPOP) for completely objective visual field assessment.
  • PalmScan VF2000: A wearable, portable analyzer with gaze tracking and customizable reports.
  • Easyfield VR: Utilizes virtual reality technology for visual field screenings and threshold exams.
  • Kowa AP-7000: Offers advanced diagnostic capabilities and high accuracy ¹ ² ³ ⁴.

Benefits:

  • Early Detection: Identifies visual field defects and conditions at an early stage.
  • Accurate Results: Provides reliable and reproducible results.
  • Patient Comfort: Some devices offer features like automated verbal instructions and gaze tracking for improved patient experience.

When selecting a Visual Field Analyzer, consider factors such as ⁵:

  • Measurement Accuracy: Look for devices with high accuracy and reliability.
  • Testing Strategies: Choose a device that offers a range of testing options.
  • Patient Comfort: Consider devices with features that improve patient experience.
  • Data Management: Ensure the device allows for easy data storage and analysis.
VISUAL FIELD ANALYSER

A Visual Field Analyzer is a medical device used to assess the sensitivity and coverage of a patient’s visual field. It maps out the field of vision, detecting any defects or abnormalities, particularly in peripheral vision.

Key Features:

  • Visual Field Testing: Measures the sensitivity of the retina in different locations.
  • Diagnostic Capabilities: Detects conditions like glaucoma, age-related macular degeneration, and other neurological disorders.
  • Variety of Tests: Offers different testing strategies, such as threshold and screening tests.

Types of Visual Field Analyzers:

  • Humphrey Field Analyzer 3 (HFA 3): Considered the gold standard, featuring Guided Progression Analysis and SITA Faster testing.
  • ObjectiveFIELD Analyzer: Uses multifocal pupillographic objective perimetry (mfPOP) for completely objective visual field assessment.
  • PalmScan VF2000: A wearable, portable analyzer with gaze tracking and customizable reports.
  • Easyfield VR: Utilizes virtual reality technology for visual field screenings and threshold exams.
  • Kowa AP-7000: Offers advanced diagnostic capabilities and high accuracy ¹ ² ³ ⁴.

Benefits:

  • Early Detection: Identifies visual field defects and conditions at an early stage.
  • Accurate Results: Provides reliable and reproducible results.
  • Patient Comfort: Some devices offer features like automated verbal instructions and gaze tracking for improved patient experience.

When selecting a Visual Field Analyzer, consider factors such as ⁵:

  • Measurement Accuracy: Look for devices with high accuracy and reliability.
  • Testing Strategies: Choose a device that offers a range of testing options.
  • Patient Comfort: Consider devices with features that improve patient experience.
  • Data Management: Ensure the device allows for easy data storage and analysis.
VISUAL FIELD ANALYSER

A Visual Field Analyzer is a medical device used to assess the sensitivity and coverage of a patient’s visual field. It maps out the field of vision, detecting any defects or abnormalities, particularly in peripheral vision.

Key Features:

  • Visual Field Testing: Measures the sensitivity of the retina in different locations.
  • Diagnostic Capabilities: Detects conditions like glaucoma, age-related macular degeneration, and other neurological disorders.
  • Variety of Tests: Offers different testing strategies, such as threshold and screening tests.

Types of Visual Field Analyzers:

  • Humphrey Field Analyzer 3 (HFA 3): Considered the gold standard, featuring Guided Progression Analysis and SITA Faster testing.
  • ObjectiveFIELD Analyzer: Uses multifocal pupillographic objective perimetry (mfPOP) for completely objective visual field assessment.
  • PalmScan VF2000: A wearable, portable analyzer with gaze tracking and customizable reports.
  • Easyfield VR: Utilizes virtual reality technology for visual field screenings and threshold exams.
  • Kowa AP-7000: Offers advanced diagnostic capabilities and high accuracy ¹ ² ³ ⁴.

Benefits:

  • Early Detection: Identifies visual field defects and conditions at an early stage.
  • Accurate Results: Provides reliable and reproducible results.
  • Patient Comfort: Some devices offer features like automated verbal instructions and gaze tracking for improved patient experience.

When selecting a Visual Field Analyzer, consider factors such as ⁵:

  • Measurement Accuracy: Look for devices with high accuracy and reliability.
  • Testing Strategies: Choose a device that offers a range of testing options.
  • Patient Comfort: Consider devices with features that improve patient experience.
  • Data Management: Ensure the device allows for easy data storage and analysis.
WHAT TO EXPECT IN A ROUTINE EYE EXAMINATION

Not knowing what to expect in routine eye Examination is quite normal. But it is not supposed to be.

It is very important for individuals who are visiting the eye clinic for the first time to know routine eye tests that should be carried out on them, as this will help them know if they are receiving proper Eyecare services or not.

There are six basic routine tests you should expect to receive on your first visit to the eye clinic and they are:

1.Visual acuity: This is a measure of how well, you can see things both at far añd near distance. This test is carried out both at 6metres and at 40cm.

2. External Examination: This is done to access the health of the external structures of your eyes like the cornea, sclera, lids, lashes, pupil, et.c. This is either done with the slit lamp biomicroscope or penlight.

3. Internal Examination: This is also known as funduscopy or ophthalmoscopy. Here the integrity of the internal structures of the eyes  are examined. This can be done with the opthalmoscope ( direct and indirect), fundus camera.

4. Tonometry: This is a measure of the intraocular pressure of the eye. This procedure is Carried out with the tonometer. Normal pressure ranges between 10mmhg and 21mmhg.

5. Visual field Examination: This is an Examination that gives an insight on the scope of the visual field. It can either be done manually ( confrontational and bjerrum screen) or automated ( Humphrey visual field analyser).

6. Refraction: This procedure accesses the refractive state of the eye. It is this procedure that determine, wether or not you will need a pair of glasses.