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A Comparison of lens manufacturing techniques
I have followed contact lens manufacturing techniques since entering the
A Tale of Two Labs
It was the best of times; it was the worst of times. This is a look at two labs that my
A collet application that is unique to optics manufacturing:
I recently was asked about gage pin vs. arbor precision. Clearly, certified
Blocking article
With the use of CNC Lathes now common, the reliance on them to produce
Process Improvement
Question: We are desperate for an accurate blocker. We have had several but so far,
Blocking tool styles and lathes
Over the years we get requests for quotes for setup new CL labs. We would request
Blocking tool update
The required precision in radial run-out, but more importantly in tilt, necessary to
Boat repair as it relates to contact lens polishing
Our Bladder Polishing System has seen wide acceptance. With each lab purchasing single
Appearance of bubbles under the blocked base curve
I have received calls about bubbles under the blocked base curve. These
Can lab-layout affect prism?
Recently we have seen two cases where the lab managers were experiencing
Collect Sizing
From time to time we are asked “What is the range that a collet will properly
Edge Polishing or Edger Rolling
We introduced our new Edging machine at the annual CLMA Zoom Meeting in January of 2021. It is
Flanged Arbors Save the day
We regularly have customers send in their blocking arbors (chucks) to test with our blocking machines.
EFCLIN 2014/ Lab Visits
By now you have probably heard that the 2014 EFCLON Congress was a great success.
Identifying sources of prism.
I. Using a dial test indicator. II. Using a gage pin to check collet condition.
Inventing the Future
"Inventing the Future" sure rings true for our (contact lens and IOL) industry. There
The Legacy Lab
First, what is a Legacy lab? I define it as a lens producing facility that uses processes that
Levels of Automation
We are receiving more and more calls about automating the contact lens
Perception of Precision, revisited
Photonics West (PW) is a trade show held in San Francisco each January. The
Polishing Insides of Scleral Lens
“I wonder if you have made any big bladders to polish the periphery of scleral lenses. I
Process housekeeping Nov. 12, '07
Dear Mr. Larsen: In your presentations, you dwell on blocking tools and various blocking
Putting things in perspective
It is always good to pull back and see the big picture in our endeavors. It helps in how we
Scleral Lens Manufacturing: Special process or just another lens to make?
We at LED have been involved in setting up labs to produce or improve scleral lens
Standards and Tooling Conventions
We all work with industry standards and conventional methods. Usually, the standards are developed by
Ten things it takes to turn edges
"Ten things it takes to turn edges"; resulting in the BC concentric with front curve.
Testimonial Laresn
I have had the opportunity to work with Larsen Equipment for over 20 years. I have
That Prism Thing
One important goal in lens manufacturing is to produce prism free lenses. Over the
Water Soluble Wax, a Case Study
In the fall of 2003, I made some trips to install our Autoblocker and Bladder
