The DeZeng Ophthalmoscope of 1922, retailed by Theodore Hamblin of London, is a superb example of the early battery-powered electric ophthalmoscope that transformed retinal examination in the early twentieth century. This instrument is in excellent condition and retains a remarkable piece of history — the original dry cell battery by Ever Ready of England, still present in the handle over a century after manufacture. Unlike modern alkaline batteries which can leak and corrode instrument interiors, this original dry cell battery has remained intact and never leaked, a testament to the quality of its construction.
The DeZeng optical firm, founded in the United States, was one of the leading producers of ophthalmic instruments in the early twentieth century before being absorbed into American Optical and subsequently Reichert — a corporate lineage that traces the consolidation of the American ophthalmic instrument industry throughout the twentieth century. The fact that this example was retailed by Theodore Hamblin of London — one of the most prestigious names in British optometry and ophthalmic instrument supply — indicates that DeZeng instruments were considered quality enough for the discerning British market, where Hamblin’s imprimatur carried significant professional weight.
The instrument comes with its original case and the original dry cell battery, making this a remarkably complete and well-preserved example. The sleek black handle design with its integrated battery compartment represents the mature form of the battery-powered ophthalmoscope that would remain the dominant design for decades, and this 1922 example sits at an important moment in that evolution — early enough to be historically significant, yet refined enough to feel thoroughly modern in its conception.
