Eagleview Eye Clinic

Tag eye Examination

NAVIGATING DRY EYE SYNDROME VIA NUTRITION

Managing dry eyes with diet involves incorporating foods rich in nutrients that support eye health. Here are some tips:

  • Omega-3 fatty acids: Include foods like salmon, sardines, walnuts, and chia seeds to reduce inflammation and promote tear production.
  • Vitamin A-rich foods: Eat carrots, sweet potatoes, spinach, and kale to support the health of the cornea.
  • Vitamin C-rich foods: Consume citrus fruits, bell peppers, and tomatoes to boost collagen production and tear quality.
  • Stay hydrated: Drink plenty of water throughout the day to keep your eyes moist.
  • Limit: Avoid foods high in sugar, salt, and processed ingredients that can exacerbate dry eyes.

Some specific foods that can help:

  • Salmon
  • Walnuts
  • Chia seeds
  • Spinach
  • Kale
  • Carrots
  • Sweet potatoes
  • Citrus fruits
  • Bell peppers.
MACULA

The macula is a specialized region at the back of the eye, responsible for central vision and fine detail.

Key functions:

  1. Central vision
  2. Color vision
  3. Fine detail vision

Location:

The macula is located at the center of the retina, including the fovea.

FOVEA CENTRALIS

The fovea centralis is a small pit in the macula of the retina, responsible for sharp central vision.

Key functions:

  1. High-acuity vision
  2. Color vision
  3. Central vision

Importance:

The fovea is crucial for tasks like reading, driving, and recognizing faces.

VISUAL AXIS

The visual axis is an imaginary line connecting the fixation point to the fovea centralis, passing through the nodal points of the eye.

Key points:

  1. Line of sight: Connects fixation point to fovea
  2. Important for: Understanding visual perception and eye alignment
  3. Used in: Ophthalmology, optometry, and vision science
SEGMENT HEIGHT

Segment height refers to the vertical measurement of a bifocal or progressive lens segment.

What it’s for:

Segment height is used to:

  1. Position the lens segment correctly
  2. Ensure optimal vision through the segment

Measurement:

Segment height is typically measured from the lower eyelid margin to the top of the segment.

Krimsky test

The Krimsky test is used to measure strabismus (misaligned eyes) in patients who can’t fixate or have poor fixation.

What it’s for:

The Krimsky test is used to:

  1. Measure strabismus in patients with poor fixation
  2. Assess ocular alignment

How it’s done:

  1. A light is shone into the patient’s eyes.
  2. Prisms are placed in front of the deviated eye.
  3. The prism is adjusted until the corneal reflections are symmetrical.

What it shows:

The test measures the amount of strabismus, helping diagnose and manage eye alignment issues.

VON GRAEFE TEST

The Von Graefe test, also known as the Von Graefe’s prism test, is used to measure the amount of heterophoria (latent strabismus).

What it’s for:

The Von Graefe test is used to:

  1. Measure heterophoria (latent strabismus)
  2. Assess binocular vision

How it’s done:

  1. The patient is asked to look at a target.
  2. A prism is placed in front of one eye.
  3. The prism is adjusted until the patient reports alignment of the target.
  4. The amount of prism required to align the target measures the heterophoria.

VAN HERRICK TEST

The Van Herrick test is a method used to estimate the depth of the anterior chamber angle in the eye.

What it’s for:

The Van Herrick test is used to:

  1. Assess the risk of angle-closure glaucoma
  2. Evaluate the anterior chamber angle width

How it’s done:

  1. A narrow slit beam is shone onto the peripheral cornea.
  2. The examiner observes the angle between the cornea and iris.
  3. The width of the angle is estimated and graded.

Grading:

The Van Herrick test grades the angle as:

  1. Grade 4: Wide open angle
  2. Grade 3: Moderate angle
  3. Grade 2: Narrow angle
  4. Grade 1: Extremely narrow angle
  5. Grade 0: Closed angle

What it shows:

The test helps identify patients at risk of angle-closure glaucoma, allowing for further evaluation and treatment if necessary.

FARNSWORTH D15 TEST

The Farnsworth D15 test is a color vision test used to assess color perception and detect color vision deficiencies. Here’s a detailed overview:

Test Procedure:

  1. Colored caps: The test consists of 15 colored caps, each with a specific hue.
  2. Arranging the caps: The patient is asked to arrange the caps in a specific order, typically in a hue sequence.
  3. Testing conditions: The test is usually administered in a well-lit room with good color rendering.

Purpose:

The Farnsworth D15 test is used to:

  1. Detect color vision deficiencies: Identify individuals with color vision problems, particularly in the blue-yellow axis.
  2. Assess color discrimination: Evaluate the patient’s ability to distinguish between different colors.
  3. Monitor color vision: Track changes in color vision over time or after treatment.

Scoring and Interpretation:

  1. Error score: The number and type of errors are recorded and scored.
  2. Color confusion index: The results are often presented as a color confusion index, which indicates the severity of color vision deficiency.
  3. Interpretation: The results help diagnose and classify color vision deficiencies, such as tritanopia (blue-yellow deficiency).

Applications:

  1. Occupational vision assessments: Used in industries where color vision is critical, such as aviation, transportation, or graphic design.
  2. Clinical assessments: Helps diagnose and manage color vision problems in patients.
  3. Research: Used in studies on color vision and its applications.

The Farnsworth D15 test is a valuable tool for assessing color vision and detecting color vision deficiencies, enabling targeted interventions and accommodations.

TITMUS FLY TEST

The Titmus fly test, also known as the Titmus stereo test or Titmus test, is a widely used assessment tool for evaluating stereopsis, which is the ability to perceive depth and 3D vision.

How it works:

  1. Polarized glasses: The patient wears polarized glasses.
  2. Image presentation: The patient views a series of images, including a fly or other objects, through the polarized glasses.
  3. Depth perception: The images are designed to create a sense of depth, and the patient is asked to identify the objects or shapes that appear to be raised or recessed.

Purpose:

The Titmus test is used to:

  1. Assess stereopsis: Evaluate the patient’s ability to perceive depth and 3D vision.
  2. Detect binocular vision problems: Identify issues with binocular vision, such as strabismus or amblyopia.
  3. Monitor treatment progress: Track changes in stereopsis during treatment or therapy.

Common applications:

  1. Pediatric vision screening: Often used in children’s vision screenings to assess depth perception.
  2. Vision therapy: Used to evaluate and improve binocular vision and stereopsis.
  3. Occupational vision assessments: May be used in certain occupations that require depth perception.

The Titmus fly test is a valuable tool for assessing stereopsis and binocular vision, helping practitioners diagnose and manage vision problems.