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Orthóptek
To see is to believe
Invented & Developed by Dr. K. S. Santhan Gopal, MD (AIIMS), FRCS(Edin) | Ophthalmologist | Ex President AIOS
What is Orthóptek?
Orthóptek is a visual stimulation device useful in treating amblyopia and related conditions in both adults and children. The effect can be seen in just 2 sessions of 35 minutes each.
The full course of treatment lasts approximately 3 months — with the first 2 weeks of treatment on consecutive days, then tapering. It is easy to set up and use, even in children as young as 4 years old.
Indications for Use
Orthóptek addresses a wide spectrum of visual conditions across all age groups.
Amblyopia
  • Strabismic amblyopia
  • Anisometropic amblyopia
  • Post congenital cataract surgery
Squint & Motility
  • Intermittent divergent squint (IXT)
  • Esotropia
  • 4th and 6th nerve palsy in adults
  • DVD
  • Recurrence of XT after surgery
Other Conditions
  • Nystagmus
  • Some cases of optic atrophy
  • Some cases of CHMD
  • Post squint surgery movement limitation
  • Decreased vision of unknown causes
Vision & Coordination
  • Loss of stereopsis
  • Hand-eye coordination
  • Ocular problems in Cerebral Palsy
  • Optic neuro problems
The Device
The Orthóptek device mounts simply on a wall and emits a calibrated visual stimulus. It requires only a nurse to supervise treatment in children; adults can use it independently.
Easy Setup
Simple wall-mount installation with minimal equipment required.
Minimal Supervision
Only a nurse needed to supervise; adults can self-administer.
Financially Viable
Many ophthalmologists recover the initial investment cost within weeks to months.
Treatment in Practice
Patients simply sit comfortably and focus on the visual stimulus displayed on the wall-mounted screen. The treatment is non-invasive, requires no patching, and is suitable for both children and adults.
Orthóptek is useful even for general ophthalmologists — not just specialists — making it a practical addition to any ophthalmic practice.
Setting Up Orthóptek
The following images illustrate the straightforward setup and use of the Orthóptek device.
Testimonials
The Response Has Been Phenomenal
"Orthóptek has seemed to have cracked the Alpha and Beta of Amblyopia treatment!! Kudos to you. I am a proud Indian today."
"Magic of Orthóptek from FC to 6/9. No patching, with only Orthóptek visual stimulation."
"Patient with Bilateral ametropic amblyopia with Nystagmus — vision enhanced to 6/6 and 49 seconds of stereopsis with Orthóptek treatment."
"Another wonder by Orthóptek! Hypermetropic Amblyopia in a 20-year-old male, improved from 6/12 to 6/6 (-2) in just 7 sittings. Stereopsis on circles improved from 800sec to 80sec. The patient is going for army recruitment."
"I can summarize in just two words: Wonder Gadget."
Science Behind Orthóptek
Cortical Aspects of Vision
Amblyopia is fundamentally a cortical deficit. Key questions include whether V1 is the primary problem, whether the deficit is functional or structural, and whether extrastriate areas are more affected than V1.
Research confirms that cortical processing deficit in amblyopia is extensive, involving large regions of extrastriate cortex beyond V1. The primary problem is in glutamate metabolism in V1.
Amblyopia — The Cortex
The Cortical Deficit
  • Is V1 the primary problem?
  • Is it functional or structural?
  • Are extrastriate areas worse than V1 deficit?
Cortical processing deficit in amblyopia is extensive, involving large regions of extrastriate cortex besides V1.
Primary Problem: Glutamate Metabolism in V1
The synaptic transmission at 4C Beta in the occipital cortex involves glutamate as the primary neurotransmitter. Disruption of NMDA receptor signaling — influenced by top-down impulses from parietal and frontal eye field areas — underlies the amblyopic deficit.
Parvo & Magnocellular Pathways
Visual information travels from the retina through distinct cell populations to the cortex, each serving different functions — "What of Vision" (P Cells) and "Where of Vision" (M Cells).
P Cells (Parvocellular)
LGB Layers 3, 4, 5 & 6 → 4C Beta Occipital Cortex → Temporal Cortex
"What of Vision"
M Cells (Magnocellular)
LGB Layers 1 & 2 → 4C Alpha Occipital Cortex → Supero Parietal Cortex
"Where of Vision"
Interconnected
P and M pathways are mutually interconnected, with top-down impulses from FEFA and parietal cortex modulating both streams.
Synaptic Transmission at 4C Beta
The Pathway
Glutamate is the primary neurotransmitter at the 4C Beta layer of the occipital cortex. The NMDA receptor plays a central role in synaptic transmission, modulated by top-down impulses from the parietal lobe and Frontal Eye Field Area (FEFA).
Retina
Sends input to presynaptic membrane
NMDA Receptor
Activated by glutamate release
Top-Down Impulses
From FEFA and parietal lobe modulate 4C Beta
Visual Processing Pathway
The complete visual processing pathway integrates bottom-up sensory signals with top-down cognitive control, spanning from retinal ganglion cells to the saccadic generation center.
Interconnections of the Eye with the Brain
Vision involves a rich network of cortical regions working in concert — from the occipital cortex to the frontal eye fields, posterior parietal cortex, and saccadic generation centers. These interconnections explain why amblyopia is a cortical, not merely an optical, problem.
Frontal Eye Field
Motor planning & voluntary saccades
Posterior Parietal Cortex
Attention & spatial awareness
Superior Colliculus
Reflexive eye movements
Temporal Cortex
"What of Vision" — object recognition
Learn More & Connect
Orthóptek YouTube Channel
Scan the QR code to watch setup and treatment videos demonstrating Orthóptek in clinical use.
Contact Dr. K. S. Santhan Gopal
Dr. K. S. Santhan Gopal
MD(AIIMS), FRCS(Edin)
Ophthalmologist | Ex President AIOS
For inquiries about Orthóptek, clinical evidence, or procurement:
"To see is to believe."