In the case of the Caucasian Albanian written language, the span of time between when the script was first seen (though not yet identified) until the first word was deciphered took 11 years. Of course, not all that time was spent trying to crack the code.
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EO: possibly they meant EOM (extra ocular movements). POOLE: they may have meant PERRLA (pupils equally round reactive to light and accommodation). EO and POOLE are not abbreviations used in ophthalmology, at least not in my experience practicing in the us. PERRLA is very commonly used by non-eye doctors.