Question 1

How well does this lens fit over prescription glassses?

Accepted Answer

The design uses standard lens holder with different welding shade levels.  The shade is protected by clear glass and magnifier.  My thought is that it would work with prescription glasses.

Question 2

Is it possible to switch the lenses on these glasses to #14?  And if so, do you sell #14 inserts?

Accepted Answer

The short answer is (a) yes and (b) I don't know. The size and configuration of these goggles is pretty standard; e.g., I switched to a shade 4 and added a magnifier lens for close-in, gas welding. I would probably want a full helmet and additional skin protection for anything requiring a shade higher than 8 myself but McMaster-Carr has a full selection that will fit these goggles, from shade 3 to 12 in fixed lens and from 9 to 13 in an auto shade. Don't know what Amazon or Hobart offers.

Question 3

Query are for soldering And what number of glass are they ???

Accepted Answer

If you are doing a lot of low temperature soldering (tin/silver, lead/tin, tin/antimony solder) with propane, butane or acetylene without an oxygen line then ANSI approved safety glasses with a shade 2 is sufficient.  Shade 3 will also obviously work, but you will need extra bright light in your work area to see the solder flow.  Don't use just regular dark tinted safety glasses - they are not rated to block infrared radiation. Many people just use clear safety glasses for soldering, but there is some UV and infrared radiation from the flame and if you do years of regular soldering without an ANSI tinted lense, it could cause eye damage. Here are links to some ANSI tinted safety glasses on Amazon: 
Uvex S1906 Skyper Safety Eyewear, Black Frame, Shade 2.0 Infra-Dura Ultra-Dura Hardcoat Lens 
https://www.amazon.com/S1906-Eyewear-Infra-Dura-Ultra-Dura-Hardcoat/dp/B002A5DKHS/

Pyramex OTS Over Prescription Glasses Safety Glasses for Welding [Shade 3]
https://www.amazon.com/gp/product/B00YA25XI8/

Question 4

Will these work over glasses?

Accepted Answer

Yes, I wear glasses and they worked for me.

ASIN	B0017Z5IZE
Apparel Fabric Stretch	No Stretch
Apparel Fabric Weight Class	Lightweight
Best Sellers Rank	#252,668 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,145 in Safety Goggles & Glasses
Brand Name	Hobart
Closure Type	Elastic
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (658)
Eyewear Type	welding glasses
Fit Type	adjustable
Fit to Size Sentiment	Positive
Frame Material	Thermoplastic Polyurethane (TPU)
Frame Type	Full Rim
Garment Size Country	United States
Global Trade Identification Number	00715959242103
Included Components	1
Industry	Welding
Item Dimensions	12 x 5 x 3.7 inches
Item Package Quantity	1
Item Shape	Rectangular
Item Weight	7.2 ounces
Lens Coating	UV Protection Coating
Lens Color	Green
Lens Material	Acetate
Manufacturer	Hobart
Material	Acetate
Number of Items	1
Part Number	770095
Product Care Instructions	Clean lenses with a soft cloth and store in a protective case when not in use.
Size	4
Special Features	Adjustable
Sport Type	Welding
Style	Protection
Style Number	770095
UPC	715959242103 735090185305
Ultraviolet Light Protection	true
Unit Count	1 Count

Hobart 770095 Welding Oxy-Acetylene Goggle - Flip Front 2-Inch x 4 1/4-Inch | Flip-front green goggle, shade 4-1/4; adjustable elastic band; replaceable lens and cover lens

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