Company: LENZ
Filing Date: 2025-03-19
Form Type: 10-K
Source: 0001815776-25-000019
Chunk: 102

Company: LENZ Therapeutics, Inc.
Filing Date: 2025-03-19
Form: 10-K
Item: Item 1
Chunk 102
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 A, The Effect of Light Level and Small Pupils on Presbyopic Reading Performance. Investigative Ophthalmology & Visual Science October 2016, Vol.57, 5656-5664.

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Table of Contents

Comparison of Miotics

LNZ100 is designed and formulated with aceclidine, a unique miotic, to achieve the below 2 mm pupil diameter without impacting distance vision, a key limitation seen by other miotics. Unlike other miotics such as pilocarpine and carbachol, aceclidine’s mechanism of action is pupil-selective, meaning it can activate the iris sphincter muscle and cause miosis without overstimulating the ciliary muscles that can cause a myopic shift and impair distance vision. Due to its pupil-selectivity and its ability to reduce the pupil diameter below 2 mm, aceclidine does not require any remaining accommodation to improve near vision, broadening its benefit to older presbyopes whose lens has lost this capacity.

The potency of a miotic towards the iris sphincter muscle or ciliary muscles can be expressed by EC50, the drug concentration required to produce 50% of its maximal effect, and its degree of pupil-selectivity can be expressed by the independence ratio, the ratio of the EC50 for the ciliary muscles to EC50 for the iris sphincter muscle. Based on a third-party, independent, peer-reviewed, academic study3 of the selectivity of certain miotics on human intraocular muscles, the independence ratio of aceclidine between the longitudinal ciliary muscle and the iris sphincter muscle can be calculated to be 28, and between the circular ciliary muscle and iris sphincter muscle to be 22, compared to 1.9 and 1.6, respectively, for pilocarpine and 5.4 and 5.3, respectively, for carbachol. The 11 to 17 times higher independence ratio of aceclidine compared to pilocarpine reflects its pupil-selectivity.

In addition to the independence ratio, another independent, peer-reviewed, academic in vivo study4 looked at the correlation of pupil diameter and visual distortion caused by the myopic shift of various miotics, including aceclidine at a concentration different from LNZ100, which contains 1.75% aceclidine. The distortion is expressed in diopters ("D"), a measurement of focusing strength and distance used widely by ECPs to measure vision. Less change