If an eye doctor prescribes eyeglasses for about 6 patients a day and works for 24 days in a month, you can calculate the total number of eyeglasses prescribed in that month using the following calculation:
\[ \text{Total eyeglasses} = \text{Number of patients per day} \times \text{Number of workdays} \]
Substituting the values:
\[ \text{Total eyeglasses} = 6 \text{ patients/day} \times 24 \text{ days} = 144 \text{ eyeglasses} \]
So, the doctor will prescribe approximately 144 eyeglasses in a month with 24 workdays.