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In this episode, George Blitch sits down with Dr. John McCall, who is the owner of Stealth Vision, a leader in higher end riflescopes, binoculars, spotting scopes & supplements.

Stealth Vision sits at the intersection of hunting optics and human vision science, and that is what makes Dr. John McCall’s approach so different. As an optometrist and eye surgeon, he thinks in both geometrical optics and physiological optics, meaning how light moves through premium glass and how your eye and brain interpret that image under stress. That blend matters most in long range shooting, where tiny errors compound into big misses. In the conversation, we trace how decades of safari hunting, clinic work, and a patented glaucoma procedure shaped his obsession with clarity, repeatability, and real-world accuracy.
 
A core problem the episode tackles is rifle cant, the subtle tilt that sneaks in when a shooter leans their head to see through the scope. McCall explains the anatomy: your eyes perform best when aligned, but when your head tilts, the eyeball tries to cyclo-rotate while extraocular muscles limit that correction. Your brain’s sense of vertical and horizontal relies on imperfect signals, so it can confidently “feel” level while you are not. At 100 yards, the error may look harmless. At 1,000 yards, a common five-degree cant can push impact feet off target, turning a planned ethical shot into a miss or worse.
 
That leads to Stealth Vision’s signature patented anti-cant system: a bubble level placed where you can actually use it, paired with a microprocessor-driven green light that acts like a simple go or no-go signal. When the scope is level within about one degree, the green illumination appears. Tilt left or right and it shuts off, so you can correct instantly without breaking your sight picture. For hunters taking quick shots on moving hogs or coyotes, that speed is the point. For precision rifle shooters, it is a consistency tool that reduces one of the most common hidden errors in field and match conditions.
 
The episode also digs into what “best glass” really means for rifle scopes, binoculars, and spotting scopes. McCall describes working with Light Optical Works in Japan and designing a scope from scratch, focusing on eye relief, the eyebox, coatings, and extra-low dispersion glass so the image stays bright in low light. He extends that thinking into binoculars and spotting scopes by using an ultra-reflective mirrored surface technology borrowed from surgical optics, aiming for measurable gains in brightness and resolution. 

Finally, we talk about practical setup basics like diopter and parallax so the reticle and target sit on the same focal plane, plus how Stealth Vision supports customers with custom turret data, QR-code training, and even on-range rifle setup out to 1,200 yards.

Highlights include:

• Dr. McCall’s background in Crockett, Texas and a 76-year family practice in optometry
 • Patented glaucoma laser procedure and how medical optics shapes product design
 • Why shooters cant the rifle and why the brain misreads level
 • How a luminous bubble and green light signal helps correct cant without losing target
 • Building scopes with premium glass, coatings, eye relief, and a scratch-built optical design
 • Binocular design using mirrored surfaces for a more telescopic viewing experience
 • Spotting scope performance and what side-by-side testing reveals at distance
 • Plans for new optics including a dangerous game scope and building a family legacy
 • Vision supplements for hunters and shooters using carotenoids plus omega-3
 • Joining the Texas Parks and Wildlife Commission and what the role covers 

To learn more about Stealth Vision optics and supplements, visit:
StealthVision.com

To learn more about the host, George Blitch, visit:
SonofaBlitch.com
IG: "thesonofablitch"