Terminology
Because prothrombin is also known as factor II, the mutation is also sometimes referred to as the factor II mutation or simply the prothrombin mutation; in either case, the names may appear with or without the accompanying G20210A location specifier (unhelpfully, since prothrombin mutations other than G20210A are known). Notes
References
External links

Mannucci, P. M. & Franchini, M. (2015). "Classic thrombophilic gene variants". Thrombosis and Haemostasis. 114 (5): 885–889. doi:10.1160/th15-02-0141. PMID 26018405. Archived from the original (review) on 10 June 2016. Retrieved 21 May 2016.
In difficult cases, "cycloplegic agents are highly favored to break spasm quickly and may be more economical compared to other conventional therapies"Cyclopentolate, Atropine, Tropicamide, and Homatropine are the typical cycloplegic eye drops used once daily to treat spasm of accommodation by relaxing the ciliary muscle. One side effect is blurred vision since these induce dilation. Vision Training
Vision therapy administered by a trained optometrist has shown a success rate of over 70%. Surgery
Multifocal intraocular lens implantation is a new possible treatment involving clear lens extraction and multifocal intraocular lens implantation but it may not be appropriate for patients who have had resistant spasm of accommodation for a long period of time. Research
Experimental Nitroglycerin and Nitric Oxide
Animal studies have found nitroglycerin, a vasodilator used to treat angina, relaxes the ciliary muscle and may hold hope for those suffering from spasm of accommodation. Nitroglycerin is currently being investigated as a treatment for glaucoma, and has shown to decrease intraocular pressure and relax the ciliary muscle. According to Investigative Ophthalmology & Visual Science Journal. "In a nonhuman primate study, topical administration of nitroglycerin at a dose of 0.1% significantly decreased IOP in normotensive animals after 90 minutes". Further, according to Wiederholt, Sturm, and Lepple-Wienhues, "The data indicate (indicates [sic]) that an increase of intracellular cGMP by application of cGMP and organic nitrate or non-nitrate vasodilators induces relaxation of the bovine trabecular meshwork and ciliary muscle". Experimental Perilla frutescens
Since spasm of accommodation is a result of contraction of the ciliary muscle, the goal would be to relax the ciliary muscle.