Biocular vs Monocular Night Vision

Published on November 16, 2021
Duration: 6:05

This video compares biocular (PVS-7) and monocular (PVS-14) night vision devices, highlighting that while historically cheaper, PVS-7 models often cost as much as PVS-14s without significant advantages. It details biocular mechanics, theoretical benefits like reduced eye strain, and practical disadvantages such as lack of passive aiming and peripheral vision loss. The content advises caution regarding fixed IPD on cheaper models and inferior glass quality, recommending PVS-7s only at a substantial discount.

Quick Summary

Biocular night vision devices like the PVS-7 use one tube for both eyes, while monoculars like the PVS-14 use one tube per eye. Bioculars offer theoretical eye strain reduction but lack depth perception and passive aiming capabilities, often being bulkier than monoculars.

Chapters

  1. 00:00PVS-7 vs PVS-14 Overview
  2. 00:55Market Options and Brands
  3. 01:24Biocular Mechanics and Theoretical Advantages
  4. 02:20Disadvantages of Biocular NVGs
  5. 04:09Buying Advice and Pitfalls
  6. 05:14Technical Quality and Mounting

Frequently Asked Questions

What is the main difference between biocular and monocular night vision?

Biocular night vision devices, like the PVS-7, use a single image intensifier tube to project an image to both eyes, often via a prism. Monocular devices, like the PVS-14, use a single tube for viewing with just one eye.

Are biocular NVGs better than monoculars for reducing eye strain?

Theoretically, bioculars might reduce eye strain by presenting the same image to both eyes. However, in practice, eye strain is rarely a significant issue for monocular users, and bioculars do not offer true depth perception.

What are the disadvantages of using biocular night vision devices?

Bioculars lack the ability for passive aiming, reduce peripheral vision as both eyes are covered, and don't allow one eye to retain natural night vision. They are also typically bulkier and heavier than monoculars.

When is it advisable to buy a PVS-7 biocular night vision goggle?

A PVS-7 is generally only recommended if you can find it at a significant discount, typically around $1200-$1500. Be cautious of fixed IPD on cheaper models and potential optical quality issues.

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