…the ultimate solution for your acuity charts needs!

TETRA® – A RIGOROUS APPROACH TO THE RELATIONSHIP BETWEEN VISION AND DYSLEXIA

TETRA is the instrument providing a comprehensive set of tests for an exhaustive and specific picture of the visuoperceptive situation in dyslexic patients, so as to help focusing the diagnosis and the rehabilitative pathway.

After many years of investigation, experimenation and technological application, so far as we know TETRA is the sole tool able to evaluate the visuoperceptive situation of the disabled reader.

Are you a Neuropsychiatrist, a Paediatrician, an Ophthalmologist, an Orthoptist, a Neurologist, a Speech Therapist, a Psychologist, a Professional Education…? Do you strongly believe in a multidisciplinary approach? TETRA has been developed for you.

TETRA website

Introduction to the TETRA® Protocol

According to a number of studies, many dyslexics show visuoperceptive abnormalities.
Even if contrast sensitivity alteration is a main finding, reinforced lateral masking between the letters making up the words is more directly implicated in the impairment of lexical task, etc.

TETRA VISUAL DYSLEXIA: THE CLINIC PROTOCOL  Video [10′ 06”]

CARLO ALECI MD, Ph.D – SCIENTIFIC PUBLICATIONS ON DYLEXIA

CARLO ALECI MD, Ph.D – THE TETRA PLATFORM

MORE ABOUT DYSLEXIA

TETRA® the diagnostic protocol

Research, experimentation and technology have led to a professional and innovative product.

The rationale underlying the Tetra platform is based on the experimental findings available in literature. It is a synthesis of tests aimed at describing the visuoperceptive status of the patient.

TETRA Reading Performance Test Results
  • 10.1”, professional line tablet, IPS and LED-backlit technology with calibrated luminance
  • Brightness 250 cd/m2
  • Working distance 1.5-5 m, step 5 cm
  • Visual Acuity from 0.03 to 2.0
  • Touch-screen wireless remote console
  • Dimensions (LxHxW): 27,5×17,5×3 cm; weight: 1.7 Kg
  • Power: USB cable
  • 2y limited warranty
  • Compliance: CE
TETRA Reading Performance Test
  • Due test (Parole e Non Parole) per la stima della funzione lessicale, basati su database normativi per classi di 3^, 4^ e 5^ elementare
  • Misura della funzione lessicale in condizioni fisiologiche e dopo livelli predefiniti di anisotropizzazione del testo
  • Misura della velocità di lettura, stima degli errori, quantificazione dell’effetto della dilatazione del testo, misura dello spazio critico ed indicazioni sulla presenza di un effetto compensatorio da sfruttare in ambito riabilitativo
  • Software con analisi statistica automatica ed integrata
  • Giudizio complessivo sul grado di coinvolgimento visuopercettivo del paziente
TETRA Eidomorphometry test
  • A triple forced choice test for characterizing and quantifing spatial relationship perception and related anisotropy level
  • Staircase psychophysical algorith
TETRA Eye motor dominance test
  • Not only visuoperceptive distortion but also unstable ocular dominance would contribute to the dyslexic’s reading disability
  • Domitest-M  for measuring motor ocular dominance

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TETRA Eye sensory dominance test
  • Not only visuoperceptive distortion but also unstable ocular dominance would contribute to the dyslexic’s reading disability
  • Domitest-M  for measuring motor ocular dominance
TETRA Contrast sensitivity test for dyslexics
  • Psychophysical test devised to measure in less than two minutes contrast sensitivity
  • Estimate focused on the lowest spatial frequencies found to be abnormal in many dyslexics
  • 6 spatial frequencies from 0.5 to 12 cicles/deg
  • Automatic data plotting with CS curve
Carlo Aleci - Dyslexia A Visual Approach

trigram

TETRA® the rehabilitive protocol

The visual training TRIGRAM, included in TETRA platform:

  • 10 sessions which train both the peripheral vision and the recognition of crowded letters
  • Reduce the lateral masking in visual dyslexics
  • Improve reading rate and accuracy

prova11-192

Eye Examination

  • Sloan letter up to 5m (VA from 0.03 to 2.0)
  • Tumbling E
  • Pigassou child pictures
  • Ishihara 24 tables
  • Stereo random dots, anaglyph
  • Fixation test
  • Randomized optotypes test
  • Customizable working distance 1.5-5m, step 5cm
Tetra All tests